Sensors

Freescale Semiconductor

4

MMA7456L

List of Tables

Pin Descriptions ............................................................................................................................................................................5

Maximum Ratings .........................................................................................................................................................................6

Operating Characteristics .............................................................................................................................................................7

Function Parameters for Detection ...............................................................................................................................................8

$16: Mode Control Register (Read/Write) ....................................................................................................................................9

Configuring the g-Select for 8-bit output using Register $16 with GLVL[1:0] bits .........................................................................9

Configuring the Mode using Register $16 with MODE[1:0] bits ...................................................................................................9

THOPT = 0 Absolute; THOPT = 1 Positive Negative .................................................................................................................10

$1B: Pulse Detection Threshold Limit Value (Read/Write) .........................................................................................................12

$1C: Pulse Duration Value (Read/Write) ....................................................................................................................................12

$1B: Pulse Detection Threshold Limit Value (Read/Write) .........................................................................................................13

$1D: Latency Time Value (Read/Write) ......................................................................................................................................13

$1B: Pulse Detection Threshold Limit Value (Read/Write) .........................................................................................................14

$1C: Pulse Duration Value (Read/Write) ....................................................................................................................................14

$1D: Latency Time Value (Read/Write) ......................................................................................................................................14

$1E: Time Window for 2nd Pulse Value (Read/Write) ................................................................................................................14

$18 Control 1 Register ................................................................................................................................................................15

Configuring the Interrupt settings using Register $18 with INTREG[1:0] bits .............................................................................15

$17: Interrupt Latch Reset (Read/Write) .....................................................................................................................................15

$0A: Detection Source Register (Read only) ..............................................................................................................................16

Pin Descriptions ..........................................................................................................................................................................19

User Register Summary .............................................................................................................................................................21

$00: 10bits Output Value X LSB (Read only) .............................................................................................................................21

$01: 10bits Output Value X MSB (Read only) ............................................................................................................................22

$02: 10bits Output Value Y LSB (Read only) .............................................................................................................................22

$03: 10bits Output Value Y MSB (Read only) ............................................................................................................................22

$05: 10bits Output Value X MSB (Read only) ............................................................................................................................22

$06: 8bits Output Value X (Read only) .......................................................................................................................................22

$07: 8bits Output Value Y (Read only) .......................................................................................................................................22

$08: 8bits Output Value Z (Read only) .......................................................................................................................................23

$09: Status Register (Read only) ...............................................................................................................................................23

$0A: Detection Source Register (Read only) ..............................................................................................................................23

$0D: I2C Device Address (Bit 6-0: Read only, Bit 7: Read/Write) ..............................................................................................23

$0E: User Information (Read Only: Optional) .............................................................................................................................23

$0F: “Who Am I” Value (Read only: Optional) ............................................................................................................................24

$10: Offset Drift X LSB (Read/Write) ..........................................................................................................................................24

$11: Offset Drift X MSB (Read/Write) .........................................................................................................................................24

$12: Offset Drift Y LSB (Read/Write) ..........................................................................................................................................24

$13: Offset Drift Y MSB (Read/Write) .........................................................................................................................................24

$14: Offset Drift Z LSB (Read/Write) ..........................................................................................................................................24

$15: Offset Drift Z MSB (Read/Write) .........................................................................................................................................25

$16: Mode Control Register (Read/Write) ..................................................................................................................................25

Configuring the g-Select for 8-bit output using Register $16 with GLVL[1:0] bits .......................................................................25

Configuring the Mode using Register $16 with MODE[1:0] bits .................................................................................................25

$17: Interrupt Latch Reset (Read/Write) .....................................................................................................................................26

$18 Control 1 (Read/Write) .........................................................................................................................................................26

Configuring the Interrupt settings using Register $18 with INTREG[1:0] bits .............................................................................26

$1A: Level Detection Threshold Limit Value (Read/Write) .........................................................................................................27

$1B: Pulse Detection Threshold Limit Value (Read/Write) .........................................................................................................27

$1C: Pulse Duration Value (Read/Write) ....................................................................................................................................27

$1D: Latency Time Value (Read/Write) ......................................................................................................................................27

$1E: Time Window for 2nd Pulse Value (Read/Write) ................................................................................................................27

Acceleration vs. Output (8-bit data) ............................................................................................................................................28