MMA7456LT Freescale Semiconductor, MMA7456LT Datasheet - Page 26

• Manufacturer Part Number: MMA7456LT
• Description: Board Mount Accelerometers 3-AXIS DIGTL 12C&SP1
• Manufacturer: Freescale Semiconductor
• Series: -r

Specifications of MMA7456LT

• Sensing Axis: X, Y, Z
• Acceleration: 2 g, 4 g, 8 g
• Sensitivity: 64 count/g, 32 count/g, 16 count/g
• Package / Case: LGA-14
• Output Type: Digital
• Supply Voltage (max): 3.6 V
• Supply Voltage (min): 2.4 V
• Supply Current: 400 uA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Axis: X, Y, Z
• Acceleration Range: ± 2g, 4g, 8g
• Voltage - Supply: 2.4 V ~ 3.6 V
• Bandwidth: 6kHz - XY, 3.4kHz - Z
• Interface: I²C, SPI
• Mounting Type: Surface Mount
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

$17: Interrupt Latch Reset (Read/Write)
CLR_INT1
1: Clear “INT1” and LDX/LDY/LDZ or PDX/PDY/PDZ bits in
Detection Source Register ($0A) depending on
Control1($18) INTREG[1:0] setting.
0: Do not clear “INT1” LDX/LDY/LDZ or PDX/PDY/PDZ bits
in Detection Source Register ($0A)
00: INT1 Register is detecting Level while INT2 is detecting Pulse.
01: INT1 Register is detecting Pulse while INT2 is detecting Level.
10: INT1 Register is detecting a Single Pulse and INT2 is detecting Single Pulse (if 2
time window and second time window > 0 then INT2 will detect the double pulse only.
INTPIN: INT1 pin is routed to INT1 bit in Detection Source Register ($0A) and INT2 pin is routed to INT2 bit in Detection Source
Register ($0A).
INTPIN: INT2 pin is routed to INT1 bit in Detection Source Register ($0A) and INT1 pin is routed to INT2 bit in Detection Source
Register ($0A).
Note: When INTREG[1:0] =10 for the condition to detect single pulse on INT1 and either single or double pulse on INT2, INT1
register bit can no longer be cleared by setting CLR_INT1 bit. It is cleared by setting CLR_INT2 bit. In this case, setting CLR_INT2
clears both INT1 and INT2 register bits and resets the detection operation.
XDA
1: X-axis is disabled for detection.
0: X-axis is enabled for detection.
YDA
1: Y-axis is disabled for detection.
0: Y-axis is enabled for detection.
ZDA
1: Z-axis is disabled for detection.
0: Z-axis is enabled for detection.
$19: Control 2 (Read/Write)
LDPL
0: Level detection polarity is positive and detecting condition
is OR 3 axes.
1: Level detection polarity is negative detecting condition is
AND 3 axes.
PDPL
0: Pulse detection polarity is positive and detecting condition
is OR 3 axes.
1: Pulse detection polarity is negative and detecting condition
is AND 3 axes.
$18 Control 1 (Read/Write)
Sensors
Freescale Semiconductor
Table 12. Configuring the Interrupt settings using Register $18 with INTREG[1:0] bits
DFBW
D7
D7
D7
--
0
0
0
INTREG[1:0]
00
01
10
THOPT
D6
D6
D6
--
0
0
0
ZDA
D5
D5
D5
--
0
0
0
Single Pulse detection
“INT1” Register Bit
Pulse Detection
Level detection
YDA
D4
D4
D4
--
0
0
0
XDA
D3
D3
D3
0
--
0
0
CLR_INT2
1: Clear “INT2” and LDX/LDY/LDZ or PDX/PDY/PDZ bits in
Detection Source Register ($0A) depending on
Control1($18) INTREG[1:0] setting.
0: Do not clear “INT2” and LDX/LDY/LDZ or PDX/PDY/PDZ
bits in Detection Source Register ($0A).
THOPT (This bit is valid for level detection only, not valid
for pulse detection)
DFBW
0: Digital filter band width is 62.5 Hz
1: Digital filter band width is 125 Hz
DRVO
0: Standard drive strength on SDA/SDO pin
1: Strong drive strength on SDA/SDO pin
0: Threshold value is absolute only
1: Integer value is available.
INTREG[1]
DRVO
D2
D2
D2
0
--
0
0
nd
Time Window = 0) or if there is a latency
INTREG[0]
CLR_INT2
Single or Double Pulse Detection
PDPL
D1
D1
D1
0
0
0
“INT2” Register Bit
Pulse Detection
Level Detection
CLR_INT1
INTPIN
LDPL
D0
D0
D0
0
0
0
MMA7456L
Function
Function
Function
Default
Default
Default
Bit
Bit
Bit
26