MMA8452QR1 Freescale Semiconductor, MMA8452QR1 Datasheet

Board Mount Accelerometers LOW G 3-AXIS 12BT EX VLT

MMA8452QR1

Manufacturer Part Number
MMA8452QR1
Description
Board Mount Accelerometers LOW G 3-AXIS 12BT EX VLT
Manufacturer
Freescale Semiconductor
Datasheets

Specifications of MMA8452QR1

Sensing Axis
X, Y, Z
Acceleration
2 g, 4 g, 8 g
Digital Output - Number Of Bits
8 bit, 12 bit
Supply Voltage (max)
3.6 V
Supply Voltage (min)
1.95 V
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Digital Output - Bus Interface
I2C
Shutdown
Yes
Sensitivity
256 count/g, 512 count/g, 1024 count/g
Package / Case
QFN-16
Output Type
Digital
Rohs Compliant
Yes
Peak Reflow Compatible (260 C)
Yes
Acceleration Range
± 2g, ± 4g, ± 8g
No. Of Axes
3
Ic Interface Type
I2C
Sensor Case Style
QFN
No. Of Pins
16
Supply Voltage Range
1.95V To 3.6V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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Freescale Semiconductor
Technical Data
An Energy Efficient Solution by Freescale
3-Axis,
Digital Accelerometer
accelerometer with 12 bits of resolution. This accelerometer is packed with
embedded functions with flexible user programmable options, configurable to two
interrupt pins. Embedded interrupt functions allow for overall power savings
relieving the host processor from continuously polling data.
filtered data as well as non filtered data available real-time. The device can be
configured to generate inertial wake-up interrupt signals from any combination of
the configurable embedded functions allowing the MMA8452Q to monitor events
and remain in a low power mode during periods of inactivity. The MMA8452Q is
available in a 3 mm x 3 mm x 1 mm QFN package.
Features
Typical Applications
© Freescale Semiconductor, Inc., 2010. All rights reserved.
This document contains certain information on a new product.
Specifications and information herein are subject to change without notice.
The MMA8452Q has user selectable full scales of ±2g/±4g/±8g with high pass
The MMA8452Q is a smart low-power, three-axis, capacitive micromachined
1.95 V to 3.6 V supply voltage
1.6 V to 3.6 V interface voltage
±2g/±4g/±8g dynamically selectable full-scale
Output Data Rates (ODR) from 1.56 Hz to 800 Hz
99 μg/√Hz noise
12-bit and 8-bit digital output
I
2 programmable interrupt pins for 6 interrupt sources
3 embedded channels of motion detection
Orientation (Portrait/Landscape) detection with set hysteresis
Automatic ODR change for Auto-WAKE and return to SLEEP
High Pass Filter Data available real-time
Self-T est
RoHS compliant
Current Consumption: 6 μA – 165 μA
E-Compass applications
Static orientation detection (Portrait/Landscape, Up/Down, Left/Right, Back/
Front position identification)
Notebook, E-Reader and Laptop Tumble and Freefall Detection
Real-time orientation detection (virtual reality and gaming 3D user position
feedback)
Real-time activity analysis (pedometer step counting, freefall drop detection
for HDD, dead-reckoning GPS backup)
Motion detection for portable product power saving (Auto-SLEEP and Auto-WAKE for cell phone, PDA, GPS, gaming)
Shock and vibration monitoring (mechatronic compensation, shipping and warranty usage logging)
User interface (menu scrolling by orientation change, tap detection for button replacement)
2
C digital output interface (operates to 2.25 MHz with 4.7 kΩ pull-up)
Freefall or Motion Detection: 1 channel
Pulse Detection: 1 channel
Jolt Detection: 1 channel
MMA8452QR1
Part Number
MMA8452QT
12-bit/8-bit
Temperature Range
-40°C to +85°C
-40°C to +85°C
ORDERING INFORMATION
Package Description
QFN-16
QFN-16
VDDIO
GND
BYP
SCL
NC
MMA8452Q: 3-AXIS DIGITAL
1
2
3
4
5
Top and Bottom View
MMA8452Q
ACCELEROMETER
3 mm x 3 mm x 1 mm
Pin Connections
CASE 2077-01
±2g/±4g/±8g
16
MMA8452Q
6
16 PIN QFN
Top View
15
7
Tape and Reel
Shipping
14
Tray
8
Rev 3, 10/2010
MMA8452Q
13
12
11
9
10
NC
GND
INT1
GND
INT2

MMA8452QR1 Summary of contents

Page 1

... User interface (menu scrolling by orientation change, tap detection for button replacement) Part Number MMA8452QT MMA8452QR1 This document contains certain information on a new product. Specifications and information herein are subject to change without notice. © Freescale Semiconductor, Inc., 2010. All rights reserved. ...

Page 2

... Serial I C Interface .................................................................................................................................................... 18 Table 8. Serial Interface Pin Description ................................................................................................................... 18 2 5.10 Operation ................................................................................................................................................. 19 2 Table Address Selection Table ....................................................................................................................... 19 Single Byte Read ......................................................................................................................................................... 19 Multiple Byte Read ....................................................................................................................................................... 19 Single Byte Write ......................................................................................................................................................... 19 Multiple Byte Write ....................................................................................................................................................... 20 2 Table 10 Device Address Sequence ................................................................................................................. 20 2 Figure 12 Timing Diagram ................................................................................................................................. 20 MMA8452Q 2 Sensors Freescale Semiconductor ...

Page 3

... Figure 13. FF_MT_CFG High and Low g Level ........................................................................................................30 0x16 FF_MT_SRC Freefall/Motion Source Register ....................................................................................................30 0x16: FF_MT_SRC Freefall and Motion Source Register (Read Only) ...............................................................30 Table 27. Freefall/Motion Source Description ..........................................................................................................31 0x17: FF_MT_THS Freefall and Motion Threshold Register .......................................................................................31 0x17 FF_MT_THS Register (Read/Write) ...........................................................................................................31 Table 28. FF_MT_THS Description ...........................................................................................................................31 Sensors Freescale Semiconductor MMA8452Q 3 ...

Page 4

... Table 51. ASLP_COUNT Relationship with ODR ..................................................................................................... 40 Table 52. SLEEP/WAKE Mode Gates and Triggers ................................................................................................. 40 6.7 Control Registers ...................................................................................................................................................... 41 0x2A: CTRL_REG1 System Control 1 Register .......................................................................................................... 41 0x2A CTRL_REG1 Register (Read/Write) .......................................................................................................... 41 Table 53. CTRL_REG1 Description .......................................................................................................................... 41 Table 54. SLEEP Mode Rate Description ................................................................................................................. 41 Table 55. System Output Data Rate Selection ......................................................................................................... 41 Table 56. Full Scale Selection .................................................................................................................................. 41 MMA8452Q 4 Sensors Freescale Semiconductor ...

Page 5

... Table 63. OFF_X Description ....................................................................................................................................44 0x30: OFF_Y Offset Correction Y Register ..................................................................................................................44 0x30 OFF_Y Register (Read/Write) ....................................................................................................................44 Table 64. OFF_Y Description ....................................................................................................................................44 0x31: OFF_Z Offset Correction Z Register ..................................................................................................................44 0x31 OFF_Z Register (Read/Write) .....................................................................................................................44 Table 65. OFF_Z Description ....................................................................................................................................44 Table 66. MMA8452Q Register Map .........................................................................................................................45 Table 67. Accelerometer Output Data .......................................................................................................................46 Package Dimensions................................................................................................................................................................47 Sensors Freescale Semiconductor MMA8452Q 5 ...

Page 6

... WAKE Auto-WAKE/SLEEP Figure 1. Block Diagram Earth Gravity INT1 INT2 Embedded 2 DSP I C Functions Single, Double through & Directional Tap Motion Detection MODE Options Low Power ACTIVE Mode Low Noise + Power SLEEP High Resolution Normal (BOTTOM VIEW) Freescale Semiconductor SDA SCL Sensors ...

Page 7

... Pin 1 LL Xout @ 0g Yout @ -1g Zout @ 0g Xout @ -1g Yout @ 0g Zout @ 0g Xout @ 0g Yout @ 1g Zout @ 0g 1.6V - 3.6V Interface Voltage VDDIO VDDIO 4.7kΩ 4.7kΩ SCL SDA Sensors Freescale Semiconductor PU Earth Gravity LR PD Xout @ 1g Yout @ 0g Zout @ 0g Figure 3. Landscape/Portrait Orientation VDDIO 2 BYP 0.1μ 0.1μF MMA8452Q ...

Page 8

... The QFN package is compliant with the RoHS standard. Please refer to AN4077. MMA8452Q 8 Description 2 C Serial Clock 2 C Serial Data Least Significant Bit of the Device I C Address Pin Status Input Input Open Open Drain Input Open Drain Input Input Output Input Output Input Input Input Input Input 2 C Sensors Freescale Semiconductor ...

Page 9

... Hz to any other data rate in the Normal, Low Noise + Low Power or High Resolution mode. 3. Before board mount. 4. Post Board Mount Offset Specifications are based Layer PCB, relative to 25°C. 5. Self-Test is one direction only. Sensors Freescale Semiconductor Test Conditions Symbol FS[1:0] set Mode ...

Page 10

... Ton Top Min Typ Max (1) 1.95 2.5 3.6 (1) 1.62 1.8 3 165 165 100 470 1.8 5 0.75*VDDIO 0.3*VDDIO 0.9*VDDIO 0.1*VDDIO 0.1*VDDIO 0.001 1000 — 350 500 2/ODR + 1 ms 2/ODR + 2 ms -40 +85 Freescale Semiconductor Unit V V μA μA μA nF μ µ °C Sensors ...

Page 11

... SDA and SCL bus lines is specified at 300 ns. The maximum fall time for the SDA output stage t f This allows series protection resistors to be connected in between the SDA and the SCL pins and the SDA/SCL bus lines without exceeding the maximum specified Sensors Freescale Semiconductor Symbol Min f SCL t 1.3 ...

Page 12

... This is an ESD sensitive, improper handling can cause permanent damage to the part. MMA8452Q 12 2 Figure Slave Timing Diagram Symbol g max VDD Vin D drop STG Symbol HBM MM CDM — Value Unit 5,000 g -0 3.6 V -0.3 to VDDIO + 0.3 V 1.8 m -40 to +85 °C -40 to +125 °C Value Unit ±2000 V ±200 V ±500 V ±100 mA Sensors Freescale Semiconductor ...

Page 13

... STANDBY to ACTIVE. These are all noted in the device memory map register table. The SLEEP and WAKE modes are ACTIVE modes. For more information on how to use the SLEEP and WAKE modes and how to transition between these modes please refer to the functionality section of this document. Sensors Freescale Semiconductor SLEEP STANDBY Figure 6. MMA8452Q Mode Transition Diagram ...

Page 14

... For more information on the data manipulation between data formats and modes, refer to Freescale application note, AN4076. There is a device driver available that can be used with the Sensor T oolbox demo board (LFSTBEB8451, 2, 3Q) with this application note. MMA8452Q interface and embedded logic used to Sensors Freescale Semiconductor ...

Page 15

... There is also directional data available in the source register to detect the direction of the motion. This is useful for applications such as directional shake or flick, which assists with the algorithm for various gesture detections. Sensors Freescale Semiconductor MMA8452Q 15 ...

Page 16

... Landscape to Portrait and then also from Portrait to Landscape. Top View Pin 1 LL Xout @ 0g Yout @ -1g Zout @ 0g Xout @ -1g Yout @ 0g Zout @ 0g Xout @ 0g Yout @ 1g Zout @ 0g MMA8452Q 16 PU Earth Gravity LR PD Xout @ 1g Yout @ 0g Zout @ 0g Figure 7. Landscape/Portrait Orientation Side View BACK Xout @ 0g Yout @ 0g Zout @ -1g FRONT Xout @ 0g Yout @ 0g Zout @ 1g Sensors Freescale Semiconductor ...

Page 17

... Z-angle lockout region. When lifting the device upright from the flat position it will be active for orientation detection as low as 29° from flat. . Figure 10. Illustration of Z-Tilt Angle Lockout Transition Sensors Freescale Semiconductor PORTRAIT 90° 0° Landscape Figure 9. Illustration of Portrait to Landscape Transition UPRIGHT 90° ...

Page 18

... C bus; the Serial Clock Line (SCL) and the Serial Data line (SDA). The latter (Table 4). INT1 INT2 6 INT CFG 2 C serial interface (Table 8). To enable the interface may be used for 2 C bus. C interface is compliant with fast mode (400 kHz), Freescale Semiconductor 2 C Sensors ...

Page 19

... MMA8452Q sends an acknowledgement that it has received the data. Since this transmission is complete, the Master transmits a stop condition (SP) to the data transfer. The data sent to the MMA8452Q is now stored in the appropriate register. Sensors Freescale Semiconductor Slave Address (SA0 = 1) 0011101 (0x1D) Figure 12 ...

Page 20

... Register Address[7: Register Address[7:0] SR Device Address[6: Data[7:0] Data[7:0] Register Address[7: Register Address[7: NAK: No Acknowledge R: Read = 1 2 Figure 12 Timing Diagram R/W 8-bit Final Value 1 0x39 0 0x38 1 0x3B 0 0x3A Device Address[6: Data[7: Data[7:0] NAK SP Data[7: Data[7:0] Data[7: Write = 0 Freescale Semiconductor NAK Sensors ...

Page 21

... TRANSIENT_COUNT R/W 0x20 (1)(3) PULSE_CFG R/W 0x21 (1)(2) PULSE_SRC R 0x22 (1)(3) PULSE_THSX R/W 0x23 (1)(3) PULSE_THSY R/W 0x24 Sensors Freescale Semiconductor Auto-Increment Address F_READ=0 F_READ=1 0x01 0x02 0x03 0x03 0x00 0x04 0x05 0x05 0x00 0x06 0x00 0x00 — — 0x0C 0x0D ...

Page 22

... RST, ST 0x00 Wake from Sleep, IPOL, PP_OD 0x00 Interrupt enable register 0x00 Interrupt pin (INT1/INT2) map 0x00 X-axis offset adjust 0x00 Y-axis offset adjust 0x00 Z-axis offset adjust — Reserved. Read return 0x00. Bit 1 Bit 0 YDR XDR Sensors Freescale Semiconductor ...

Page 23

... ZDR is set whenever a new acceleration sample related to the Z-axis is generated. ZDR is cleared anytime OUT_Z_MSB register is read. YDR is set whenever a new acceleration sample related to the Y-axis is generated. YDR is cleared anytime OUT_Y_MSB register is read. XDR is set whenever a new acceleration sample related to the X-axis is generated. XDR is cleared anytime OUT_X_MSB register is read. Sensors Freescale Semiconductor MMA8452Q 23 ...

Page 24

... Bit 4 Bit 3 ZD0 0 Bit 4 Bit Bit 2 Bit 1 Bit 0 XD6 XD5 XD4 Bit 2 Bit 1 Bit Bit 2 Bit 1 Bit 0 YD6 YD5 YD4 Bit 2 Bit 1 Bit Bit 2 Bit 1 Bit 0 ZD6 ZD5 ZD4 Bit 2 Bit 1 Bit Bit 2 Bit 1 Bit 0 0 SYSMOD1 SYSMOD0 Sensors Freescale Semiconductor ...

Page 25

... Logic ‘1’ indicates that the data ready interrupt is active indicating the presence of new data and/or data overrun. SRC_DRDY Otherwise logic ‘0’ the interrupt is not active. This bit is asserted when the ZYXOW and/or ZYXDR is set and the interrupt has been enabled. This bit is cleared by reading the X, Y, and Z data. Sensors Freescale Semiconductor Bit 4 Bit 3 Bit 2 SRC_LNDPRT SRC_PULSE ...

Page 26

... Table 16. Full Scale Range FS1 FS0 Full Scale Range Reserved Table 18. For details of implementation on the high pass filter, refer Bit 4 Bit 3 0 Table 18). Bit 2 Bit 1 Bit Bit 2 Bit 1 Bit 0 0 FS1 FS0 Bit 2 Bit 1 Bit 0 0 SEL1 SEL0 Freescale Semiconductor Sensors ...

Page 27

... BAFRO, or LAPO occurs. NEWLP bit is cleared anytime PL_STATUS register is read. The Orientation mechanism state change is limited to a maximum 1.25g. LAPO BAFRO and LO continue to change when NEWLP is set. The current position is locked if the absolute value of the acceleration experienced on any of the three axes is greater than 1.25g. Sensors Freescale Semiconductor Oversampling Mode = Normal 400 Hz 200 Hz ...

Page 28

... Bit 5 Bit 4 Bit ≥ ±75°. Bit 2 Bit 1 Bit Bit 2 Bit 1 Bit 0 DBNCE[1] DBNCE[0] Time Step (ms) LPLN HighRes LP 1.25 1.25 1.25 2.5 2.5 2 2.5 160 80 2.5 160 Bit 2 Bit 1 Bit 0 ZLOCK[2] ZLOCK[1] ZLOCK[0] Sensors Freescale Semiconductor ...

Page 29

... EA is zero, the event flags ZHE, ZHP, YHE, YHP, XHE, and XHP reflect the motion detection status (i.e., high g event) without any debouncing, provided that the corresponding bits ZEFE, YEFE, and/or XEFE are set. When the EA bit is set, these bits keep their current value until the FF_MT_SRC register is read. Sensors Freescale Semiconductor Bit 4 Bit 3 P_L_THS[1] ...

Page 30

... ZHE MMA8452Q 30 Bit 4 Bit 3 YEFE XEFE +8g High g + Threshold (Motion) Low g Threshold (Freefall) High g - Threshold (Motion) -8g Figure 13. FF_MT_CFG High and Low g Level Bit 4 Bit 3 ZHP YHE Bit 2 Bit 1 Bit Positive Acceleration Negative Acceleration Bit 2 Bit 1 Bit 0 YHP XHE XHP Sensors Freescale Semiconductor ...

Page 31

... While the DBCNTM bit is set to logic ‘0’ the debounce counter is decremented by 1 whenever the inertial event of interest is no longer true becomes active. Decrementing the debounce counter acts as a median enabling the system to filter out irregular spurious events which might impede the detection of inertial events. Sensors Freescale Semiconductor Bit 4 Bit 3 THS4 THS3 (Figure ...

Page 32

... Normal 0.319 0.319 1.25 0.638 0.638 2.5 0.638 1.28 5 0.638 2.55 10 0.638 5.1 20 0.638 20.4 20 0.638 40.8 20 0.638 40.8 20 Bit 2 Bit 1 Bit Time Step (ms) LPLN HighRes LP 1.25 1.25 1.25 2.5 2.5 2 2.5 160 80 2.5 160 Sensors Freescale Semiconductor ...

Page 33

... Detect) Count Threshold FF Counter Value FFEA High g Event on all 3-axis (Motion Detect) Count Threshold Debounce Counter Value EA High g Event on all 3-axis (Motion Detect) Count Threshold Debounce Counter Value EA Sensors Freescale Semiconductor Figure 14. DBCNTM Bit Function (a) DBCNTM = 1 (b) DBCNTM = 0 (c) MMA8452Q 33 ...

Page 34

... When the EA bit gets set while ELE = 1, all other status bits get frozen at their current state. By reading the TRANSIENT_SRC register, all bits get cleared. MMA8452Q 34 Bit 4 Bit 3 0 ELE ZTEFE Bit 4 Bit 3 Z_Trans_Pol YTRANSE Bit 2 Bit 1 Bit 0 YTEFE XTEFE HPF_BYP Bit 2 Bit 1 Bit 0 Y_Trans_Pol XTRANSE X_Trans_Pol Sensors Freescale Semiconductor ...

Page 35

... Sensors Freescale Semiconductor Bit 4 Bit 3 THS4 THS3 Bit 4 Bit HighRes LP Normal 0.319 0.319 1.25 0.638 0.638 2.5 0.638 1.28 5 0.638 2 ...

Page 36

... When the EA bit gets set while ELE = 1, all status bits (AxZ, AxY, AxZ, DPE, and PolX, PolY, PolZ) are frozen. Reading the PULSE_SRC register clears all bits. Reading the source register will clear the interrupt. MMA8452Q 36 Bit 4 Bit 3 ZSPEFE YDPEFE Bit 4 Bit 3 AxY AxX DPE Bit 2 Bit 1 Bit 0 YSPEFE XDPEFE XSPEFE Bit 2 Bit 1 Bit 0 PolZ PolY PolX Sensors Freescale Semiconductor ...

Page 37

... Sensors Freescale Semiconductor Bit 4 Bit 3 Bit 2 THSX4 THSX3 THSX2 Bit 4 Bit 3 Bit 2 THSY4 THSY3 THSY2 Bit 4 Bit 3 Bit 2 THSZ4 THSZ3 THSZ2 Bit 4 Bit 3 ...

Page 38

... Bit 1 Bit 0 LTCY1 LTCY0 Time Step (ms) HighRes LP 2.5 2.5 2 160 5 160 160 5 320 160 5 320 Time Step (ms) HighRes LP 1.25 1.25 1.25 1.25 1.25 2.5 2 1.25 80 Sensors Freescale Semiconductor ...

Page 39

... Sensors Freescale Semiconductor Bit 4 Bit 3 WIND4 WIND3 WIND2 Table 48 and Table 49. The maximum time is the time step at the ODR, HighRes LP Normal 0.638 0.638 2.5 1.276 1.276 5 1 ...

Page 40

... Event restarts timer and delays Return to SLEEP Yes Yes Yes Yes No* No Bit 2 Bit ASLP_COUNT Step 320 ms 320 ms 320 ms 320 ms 320 ms 320 ms 320 ms 640 ms Event will WAKE from SLEEP Yes Yes Yes Yes No* No Freescale Semiconductor Bit 0 D0 Sensors ...

Page 41

... Note: Any thresholds set above 4g will not be reached. F_Read bit selects between Normal and Fast Read mode. When selected, the auto increment counter will skip over the LSB data bytes. Sensors Freescale Semiconductor Bit 4 Bit 3 DR1 DR0 for more information ...

Page 42

... Bit 2 Bit 1 SLPE MODS1 MODS0 Table 58. The Oversampling modes are Normal Low Power (11) μ μ Ratio Current A OS Ratio 1024 6 16 256 6 4 128 165 2 Freescale Semiconductor Bit 0 Sensors ...

Page 43

... Data Ready interrupt disabled; 1: Data Ready interrupt enabled The corresponding functional block interrupt enable bit allows the functional block to route its event detection flags to the system’s interrupt controller. The interrupt controller routes the enabled functional block interrupt to the INT1 or INT2 pin. Sensors Freescale Semiconductor Bit 5 Bit 4 Bit 3 ...

Page 44

... Z-axis offset value. Default value: 0000_0000. MMA8452Q 44 Bit 4 Bit 3 Description Figure 11 uses the corresponding bit field in the CTRL_REG5 register to determine Bit 4 Bit Bit 4 Bit Bit 4 Bit Bit 2 Bit 1 Bit 0 0 INT_CFG_DRDY Bit 2 Bit 1 Bit Bit 2 Bit 1 Bit Bit 2 Bit 1 Bit Sensors Freescale Semiconductor ...

Page 45

... INT_EN_ASLP R/W Control Reg5 2E CTRL_REG5 (Interrupt Configuration) INT_CFG_ASLP R/W 2F OFF_X X 8-bit offset R/W 30 OFF_Y Y 8-bit offset R/W 31 OFF_Z Z 8-bit offset R/W Sensors Freescale Semiconductor Bit 7 Bit 6 Bit 5 Bit 4 ZOW YOW XOW XD9 XD8 XD7 XD6 XD1 XD0 0 0 YD9 YD8 YD7 ...

Page 46

... Range ±8g (3.9 mg) +7.996g +7.992g … +0.004g 0.0000g -0.004g … -7.996g -8.0000g Range ±8g (62.5 mg) +7.9375g +7.8750g … +0.0625g 0.0000g -0.0625g … -7.9375g -8.0000g Sensors Freescale Semiconductor ...

Page 47

... Sensors Freescale Semiconductor PACKAGE DIMENSIONS CASE 2077-01 ISSUE O 16-LEAD QFN MMA8452Q 47 ...

Page 48

... MMA8452Q 48 PACKAGE DIMENSIONS CASE 2077-01 ISSUE O 16-LEAD Q Sensors Freescale Semiconductor ...

Page 49

... Sensors Freescale Semiconductor PACKAGE DIMENSIONS CASE 2077-01 ISSUE O 16-LEAD Q MMA8452Q 49 ...

Page 50

... Freescale Semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Freescale Semiconductor assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. “ ...

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