STMPE16M31PXQTR STMicroelectronics, STMPE16M31PXQTR Datasheet
STMPE16M31PXQTR
Specifications of STMPE16M31PXQTR
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STMPE16M31PXQTR Summary of contents
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... Portable media players and game consoles ■ Mobile phones and smartphones Table 1. Device summary Order code STMPE24M31PXQTR STMPE16M31PXQTR February 2010 This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice. S-Touch™ 16/24-channel touchkey controller ( mm) Description ...
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Contents Contents 1 Pin assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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STMPE16M31PX, STMPE24M31PX 13.3 Auto tuning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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Pin assignment 1 Pin assignment Figure 1. STMPE24M31PX pin out 4/82 STMPE16M31PX, STMPE24M31PX Doc ID 17058 Rev 1 ...
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STMPE16M31PX, STMPE24M31PX Figure 2. STMPE16M31PX pin out Table 2. Pin description STMPE24M31PX pin number STMPE16M31PX Pin name pin number 1 GPIO-0 2 GPIO-1 3 GPIO-2 4 ...
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Pin assignment Table 2. Pin description (continued) STMPE24M31PX Pin number 6/82 STMPE16M31PX Pin name ...
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STMPE16M31PX, STMPE24M31PX Figure 3. Block diagram Doc ID 17058 Rev 1 Pin assignment 7/82 ...
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Pin assignment Figure 4. Sample application - notebook multimedia bar Table 3. Limitations on intrinsic capacitance on PCB / flexi PCB Cmax-Cmin (Difference between highest and lowest channel capacitance) < < > 30 pF, < 60 ...
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STMPE16M31PX, STMPE24M31PX 1.1 Power scheme The STMPE24M31PX/16M31PX is powered by a 2.7- 5.5 V supply. An internal voltage regulator regulates this supply into 1.8 V for core operation recommended to connect a 1 µF capacitor at V driving ...
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I C interface module interface module The STMPE24M31PX/16M31PX has 2 physical I address settings. 2 Table address pins Address The features that are supported by the I ...
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STMPE16M31PX, STMPE24M31PX Acknowledge bit (ACK) The acknowledge bit is used to indicate a successful byte transfer. The bus transmitter releases the SDA after sending eight bits of data. During the ninth bit, the receiver pulls the SDA low to acknowledge ...
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I C interface module Figure 6. Read and write modes (random and sequential ...
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STMPE16M31PX, STMPE24M31PX Figure 7. Flow diagram for read and write modes Doc ID 17058 Rev interface module 13/82 ...
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Read operations 3 Read operations Read operations for one or more bytes A write is first performed to load the base register address into the address counter but without sending a Stop condition. Then, the bus master sends a reStart ...
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STMPE16M31PX, STMPE24M31PX 4 Write operations 4.1 Write operations for one or more bytes A write is first performed to load the base register address into the Address Counter without sending a Stop condition. After the bus master receives an acknowledgement ...
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General call address 5 General call address A general call address is a transaction with the slave address of 0x00 and R When a general call address is made, the GPIO expander responds to this transaction with an ...
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STMPE16M31PX, STMPE24M31PX 6 Register map and function description This section lists and describes the registers of the STMPE16M31PX and STMPE24M31PX devices, starting with a register map and then provides detailed descriptions of register types. Table 8. Register map Address 0x00 ...
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Register map and function description Table 8. Register map (continued) Address 0x27 0x28 0x29 0x2A 0x2B 0x2C 0x2D 0x2E 0x2F 0x30 0x40 0x41 0x42 0x43 0x44 0x45 0x46 0x47 0x48 0x49 0x4A 0x4B 0x4C 0x4D 0x4E 0x4F 0x50 0x51 0x52 ...
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STMPE16M31PX, STMPE24M31PX Table 8. Register map (continued) Address 0x53 0x54 0x55 0x56 0x57 0x58 0x59 0x5A 0x5B 0x5C 0x5D 0x5E 0x5F 0x70 0x71 0x72 0x76 0x77 0x78 0x7C 0x90 0x92 0x96 0x97 0x98 Register name Reset value PWM_4_TRIG 0x00 PWM_5_SET ...
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Register map and function description Table 8. Register map (continued) Address 0xB1 0xBO 0x9A 0xB4 0xC0 0xC2 0xC4 0xC6 0xC8 0xCA 0xCC 0xCE 0xD0 0xD2 0xD4 0xD6 0xD8 0xDA 0xDC 0xDE 0xE0 0xE2 0xE4 0xE6 0xE8 0xEA 0xEC 0xEE 20/82 ...
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STMPE16M31PX, STMPE24M31PX 7 System controller The system controller contains the registers that control the following functions: – Device identification – Version identification – Power state management – Clock speed management – Clock gating to various modules Table 9. System controller ...
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System controller SYSCON-1 Address: 0x03 Type: R/W Reset: 0x00 Description: The general system control register (SYSCON-1) controls the operation state and clock speed of the device RESERVED RESERVED RESERVED [7:5] RESERVED: Do not write ...
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STMPE16M31PX, STMPE24M31PX SYSCON-2 Address: 0x04 Type: R/W Reset: 0xFE Description: Sensor and PWM clock divider. The SYSCON-2 register controls the sensor and PWM clock speed, and the clock gating of various functional modules. This bit will always read '0'. as ...
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System controller [2] PMW_CLK: PWM clock disable Write “1“ to disable the clock to PWM module. When clock to PWM module is disabled, access to PWM module register will not work correctly. [1] GPIO_CLK: GPIO clock disable Write “1” to ...
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STMPE16M31PX, STMPE24M31PX 7.1 Interrupt system This module controls the interruption to the host based on the activity of other modules in the system, such as the capacitive sensing, GPIO and PWM modules. Figure 8. Interrupt system Table 10. Interrupt system ...
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System controller INT_CTRL Address: 0x06 Type: R/W Reset: 0x00 Description: SYSCON3 controls the interrupt signal generation RESERVED [7:3] RESERVED [2] INT_POL: Interrupt polarity 0: Active low 1: Active high [1] INT_TYPE: Interrupt trigger type ...
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STMPE16M31PX, STMPE24M31PX INT_STA Address: 0x08 Type: R/W Reset: 0x00 Description: This register holds interrupt status from each event GPIO PWM WAKEUP [7] GPIO: Activity in GPIO Read ‘1’ if GPIO event occurs Write ‘1’ ...
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System controller INT_EN Address: 0x09 Type: R/W Reset: 0x00 Description: Controls interrupt source enable GPIO PWM WAKEUP [7] GPIO: Activity in GPIO Write ‘1’ to enable interrupt signal from GPIO Write ‘0’ to disable ...
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STMPE16M31PX, STMPE24M31PX GPIO_INT_STA Address: 0x0A – 0x0B Type: R/W Reset: 0x0000 Description: This register reflects the status of GPIO that has been configured as input. When there is a change in GPIO state, the corresponding bit will be set to ...
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System controller GPIO_INT_EN Address: 0x0C – 0x0D Type: R/W Reset: 0x0000 Description: This register is used to enable the generation of interrupt signal, at the INT pin. LSB (0x0C IO-7 IO MSB (0x0D) 7 ...
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STMPE16M31PX, STMPE24M31PX PWM_INT_EN Address: 0x0F Type: R/W Reset: 0x00 Description: Writing ‘1’ to this register enables the generation of INT by the corresponding PWM channel PWM-7 PWM [7:0] PWM - X Enable of PWM ...
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Interrupt service routine 8 Interrupt service routine On receiving an interrupt, system software should: Read InterruptStatus If (GPIO.bit==1) { Read InterruptStatusGPIO Process GPIO INT Write InterruptStatusGPIO to clear the corresponding bit Write InterruptStatus to clear the corresponding bit } If ...
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STMPE16M31PX, STMPE24M31PX 9 GPIO controller A total of 16 GPIOs are available in the STMPE24M31PX/STMPE16M31PX. Most of the GPIOs are sharing physical pins with some alternate functions. The GPIO controller contains the registers that allow the host system to configure ...
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GPIO controller GPIO_MP_STA Address: 0x12 – 0x13 Type: R Reset: 0x00 Description: Contains the state of all GPIO. LSB (0x12 IO-7 IO MSB (0x13 IO-15 IO- [7:0] IO ...
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STMPE16M31PX, STMPE24M31PX GPIO_SET_PIN Address: 0x14 – 0x15 Type: RW Reset: 0x00 Description: Setting of the I/O output state. LSB (0x14 IO-7 IO MSB (0x15 IO-15 IO- [7:0] IO ...
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GPIO controller GPIO_AF Address: 0x16 – 0x17 Type: RW Reset: 0x00 Description: Setting of the GPIO function. LSB (0x16 IO-7 IO MSB (0x17 IO-15 IO- [7: ...
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STMPE16M31PX, STMPE24M31PX 10 PWM array controller The STMPE24M31PX integrates 8 independent PWM controllers capable of blinking and brightness control. Each of the PWM controllers can be programmed to execute a series of blinking/brightness control actions. One PWM controller could be ...
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PWM array controller GPIO_PWM_CFG Address: 0x20-2F Type: RW Reset: 0x00 Description: This register controls the routing network which connects each PWM channel to any GPIO channel. GPIOn_PWM_CFG register (n=0-15, represent the GPIO channel number OUT_EN RESERVED RW RW ...
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STMPE16M31PX, STMPE24M31PX 11 PWM controller The PWM controller allows to control the brightness, ramping/fading and blinking of LEDs. The STMPE24M31PX/16M31PX features 8 independent PWM controllers. The PWM controllers outputs are connected to the GPIO through the PWM array controller. The ...
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PWM controller Table 12. PWM function registers (continued) Address Register name 0x50 0x51 PWM_4_CTRL 0x52 PWM_4_RAMP 0x53 PWM_4_TRIG 0x54 0x55 PWM_5_CTRL 0x56 PWM_5_RAMP 0x57 PWM_5_TRIG 0x58 0x59 PWM_6_CTRL 0x5A PWM_6_RAMP 0x5B PWM_6_TRIG 0x5C 0x5D PWM_7_CTRL 0x5E PWM_7_RAMP 0x5F PWM_7_TRIG PWM_MASTER_EN ...
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STMPE16M31PX, STMPE24M31PX PWM_n_SET Address: 0x40, 0x44, 0x48, 0x4C, 0x50, 0x54, 0x58, 0x5C Type: RW Reset: 0x00 Description: Setting of brightness, time unit and ramp-mode BRIGTHNESS [7:4] BRIGHTNESS: It defines the duty cycle during the ...
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PWM controller PWM_n_CTRL Address: 0x41, 0x45, 0x49, 0x4D, 0x51, 0x55, 0x59, 0x5D Type: RW Reset: 0x00 Description: Setting of ON/OFF period, repetition, and ON/OFF order Period [7:6] Period 0 Define the ON time ...
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STMPE16M31PX, STMPE24M31PX PWM_n_RAMP_RATE Address: 0x42, 0x46, 0x4A, 0x4E, 0x52, 0x56, 0x5A, 0x5E Type: RW Reset: 0x00 Description: Setting of ramp rate 7 6 INV Reserved [7] INV LED driving/sinking mode Write ‘1’ for LED sinking mode ...
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PWM controller PWM_n_TRIG Address: 0x43, 0x47, 0x4B, 0x4F, 0x53, 0x57, 0x5B, 0x5F Type: RW Reset: 0x00 Description: Setting of touch sensor-triggered PWM RESERVED [7:6] RESERVED [6:5] EN: Write ‘1’ to enable touch sensor-triggered ...
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STMPE16M31PX, STMPE24M31PX 12 Basic PWM programming The PWM controllers are capable of generating the following brightness patterns: Figure 10. Pulses with programmable brightness, ON/OFF period and repetition The registers need to be programmed for this sequence: – On period = ...
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Basic PWM programming The registers need to be programmed for this sequence : – On Period = Period 0[1:0] * Time Unit [3:0] – Off Period = Period 1[1:0] * Time Unit [3:0] – Duty cycle during On Period = ...
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STMPE16M31PX, STMPE24M31PX 12.1 Interrupt on basic PWM controller A basic PWM controller could be programmed to generate interrupt on completion of blinking sequence. User needs to consider: a) Each basic PWM controller has its own bit in interrupt enable/status registers. ...
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... Touch sensor controller 13 Touch sensor controller The STMPE16M31PX and STMPE24M31PX devices use the STMicroelectronics’ patent pending capacitive front end. The capacitive sensor is configure by the following registers: Table 13. Touch sensor controller registers Address Register Name 0x70 CH_SEN_CTRL 0x72 0x76 0x77 0x78 ...
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STMPE16M31PX, STMPE24M31PX Figure 13. Touch sensing module flowchart 13.1 Sampling rate calculation The capacitive sensor operates with a 2 MHz base clock, a single capacitive sensor scans active channels. The SCLK_DIV divides the sensor clock by 32-1024, ...
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Touch sensor controller 13.2 Sensor resolution The capacitive sensor hardware in the STMPExxM31 devices has a sensitivity and a range of 512 steps giving it a dynamic range of 7.5 pF. The impedance reading is the output ...
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STMPE16M31PX, STMPE24M31PX Figure 14. Auto tuning operation Doc ID 17058 Rev 1 Touch sensor controller 51/82 ...
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Touch sensor controller 13.4 Locked impedance Locked impedance is data available in channel data the moment 0x06 is written into “channel data type register”. Writing a different value into the “channel data type register” allows the locked impedance to be ...
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STMPE16M31PX, STMPE24M31PX CAP_SEN_CTRL Address: 0x70 Type: RW Reset: 0x00 Description: This register controls the capacitive sensor’s operation CS_EN [7] CS_EN Write ‘1’ to enable the capacitive sensor module Write ‘0’ to disable the capacitive ...
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Touch sensor controller CH_SEL Address: 0x72-0x74 Type: RW Reset: 0x000000 Description: This register configures the active capacitive sensing channels. Bit 7-0 (0x72 Bit 15-8 (0x73 S15 S14 ...
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STMPE16M31PX, STMPE24M31PX CAL_INT Address: 0x76 Type: RW Reset: 0x00 Description: This register configures the interval between successive calibrations MULTIPLIER [7:6] MULTIPLIER Set the multiplier value for calibration interval set in Interval[5:0] ‘00’ for 8 ...
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Touch sensor controller CAL_MOD Address: 0x77 Type: RW Reset: 0x00 Description: This register configures the way calibration samples are collected, and the model of calibration algorithm CSInterval [7:3] CSInterval Set the interval between samples ...
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STMPE16M31PX, STMPE24M31PX MAF_SET Address: 0x78 Type: RW Reset: 0x00 Description: This register chooses the median averaging filter mode Reserved [2:1] MAF_Mode ‘00’ to collect 10 samples, remove 2 samples ‘01’ to collect 18 samples, ...
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Touch sensor controller CH_DATA-n Address: 0xC0-0xEF Type: RW Reset: 0x00 Description: Capacitive sensor channel data. The type of data represented by this register depends on the channel data type register (0x7C). LSB, address : 0xC0 + (2*N channel ...
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STMPE16M31PX, STMPE24M31PX 13.6 Definition of data accessible through channel data register Table 14. Types of data accessible through the channel data register Data name TVR EVR Channel delay Impedance Calibrated Impedance Locked impedance TVR (touch variance register threshold ...
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Touchkey and proximity sensing controller 14 Touchkey and proximity sensing controller The touchkey controller processes raw capacitance measurement data into “touch/no- touch” boolean data for easy usage. The key filter unit provides additional flexibility by allowing the system to define ...
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STMPE16M31PX, STMPE24M31PX Figure 16. Data flow in touchkey controller Touchkey and proximity sensing controller Doc ID 17058 Rev 1 61/82 ...
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Touchkey and proximity sensing controller KEY_PROX_CTRL Address: 0x90 Type: RW Reset: 0x00 Description: Setting of key filter unit PROX_CHL_SELECT [7:4] PROX_CHL_SELECT: Chooses one of the first 16 sensing channel as proximity sebsor input [3] ...
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STMPE16M31PX, STMPE24M31PX KEY_FILT_GROUP-1 Address: 0x92-0x94 (KeyFilterMask1) Type: R/W Reset: 0x000000 Description: Configure the channels included in a group of key filter unit. Bit 7-0 (0x92 Bit 15-8 (0x93 S15 S14 ...
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Touchkey and proximity sensing controller KEY_FILT_DATA Address: 0x9A-0x9C Type: RW Reset: 0x000000 Description: Represent the status of (touch/no-touch), after being filtered by key filter unit. This register is always active and key status can be accessed from this register regardless ...
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STMPE16M31PX, STMPE24M31PX TOUCH_DET Address: 0xB4-B6 Type: RW Reset: 0x000000 Description: Represents the real time status of the touchkey input. This is a direct result of comparison of sensed impedance with calibrated impedance (taking in account of hysteresis). This data is ...
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Touchkey and proximity sensing controller Bit 23-16 (0xB6 S23 S22 R/W R [7:0] S-X Read ‘1’ if the corresponding sensor channel status is ‘touched’ PROX_CFG 7 6 DITHERING RESERVED R/W R Address: 0x96 Type: ...
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STMPE16M31PX, STMPE24M31PX PTVR Address: 0x97 Type: RW Reset: 0x00 Description: Proximity variance register. Typical value is 0x08 - 0x20 Touchkey and proximity sensing controller Proximity variance register Doc ID 17058 Rev 1 67/82 ...
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Touchkey and proximity sensing controller PEVR Address: 0x98 Type: RW Reset: 0x00 Description: Proximity enviromental variance register. [7] Forced proximity calibration EVR used for proximity detection. typically value of 0x02-0x05 is used. [6] Writing '1' to this bit forces the ...
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STMPE16M31PX, STMPE24M31PX 15 Maximum rating Stressing the device above the rating listed in the “Absolute maximum ratings” table may cause permanent damage to the device. These are stress ratings only and operation of the device at these or any other ...
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DC electrical characteristics 16 DC electrical characteristics - unless stated otherwise. °C Table 18. DC electrical characteristics Symbol Vcc Core supply voltage Vio IO supply voltage Iactive ACTIVE current Iactive ACTIVE current Isleep SLEEP current Ihibernate HIBERNATE current ...
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STMPE16M31PX, STMPE24M31PX 16.1 Capacitive sensor specification - unless stated otherwise. °C Symbol Capacitive sensor Cs sensitivity Variance of Cs across Csvr channels Parameter Test conditions V = 2.7 - 5.5 V, internal IO V REG V = 2.7 ...
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Package mechanical data 17 Package mechanical data In order to meet environmental requirements, ST offers these devices in different grades of ® ECOPACK packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product status are available ...
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STMPE16M31PX, STMPE24M31PX Figure 17. Package outline for QFN40 ( mm) - pitch 0.4 mm Doc ID 17058 Rev 1 Package mechanical data 73/82 ...
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Package mechanical data Table 19. Package mechanical data for QFN40 ( mm) - pitch 0.4 mm Symbol Figure 18. QFN40 recommended footprint without ground pad VIA 74/82 STMPE16M31PX, ...
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STMPE16M31PX, STMPE24M31PX Figure 19. QFN40 recommended footprint with ground pad VIA 0.68 1.27 0.30 1.27 0.68 Via Doc ID 17058 Rev 1 Package mechanical data 75/82 ...
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Package mechanical data Figure 20. Tape information for QFN40 ( mm) - pitch 0.4 mm 76/82 STMPE16M31PX, STMPE24M31PX Doc ID 17058 Rev 1 ...
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STMPE16M31PX, STMPE24M31PX Figure 21. Reel information for QFN40 ( mm) - pitch 0.4 mm Doc ID 17058 Rev 1 Package mechanical data 77/82 ...
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Package mechanical data Figure 22. Package outline for QFN32 ( mm) - pitch 0.4 mm 78/82 STMPE16M31PX, STMPE24M31PX Doc ID 17058 Rev 1 POA_QFN32_8186986_A ...
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STMPE16M31PX, STMPE24M31PX Table 20. Package mechanical data for QFN32 ( mm) - pitch 0.4 mm Symbol e/2 L Millimeters Min Typ 0.70 - 0.03 0.05 - 0.20 0.19 0.21 ...
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Package mechanical data Figure 23. Footprint recommendation for QFN32 ( mm) - pitch 0.4 mm 80/82 STMPE16M31PX, STMPE24M31PX Doc ID 17058 Rev 1 QFN32_FR ...
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STMPE16M31PX, STMPE24M31PX 18 Revision history Table 21. Document revision history Date 08-Feb-2010 Revision 1 Initial release. Doc ID 17058 Rev 1 Revision history Changes 81/82 ...
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