Sensors

Freescale Semiconductor, Inc.

14

MMA7660FC

REGISTER DEFINITIONS

NOTE: To write to the registers the MODE bit in the MODE (0x07) register must be set to 0, placing the device in Standby Mode.

$00: 6-bits output value X (Read Only when not in Test Mode)

XOUT — X Output

Signed byte 6-bit 2’s complement data with allowable range of +31 to -32.

XOUT[5] is 0 if the g direction is positive, 1 if the g direction is negative.

If the Alert bit is set, the register was read at the same time as the device was attempting to update the contents. The register

must be read again.

$01: 6-bits output value Y (Read Only when not in Test Mode)

YOUT — Y Output

Signed byte 6-bit 2’s complement data with allowable range of +31 to -32.

YOUT[5] is 0 if the g direction is positive, 1 if the g direction is negative.

If the Alert bit is set, the register was read at the same time as the device was attempting to update the contents. The register

must be read again.

$02: 6-bits output value Z (Read Only when not in Test Mode)

ZOUT — Z Output

Signed byte 6-bit 2’s complement data with allowable range of +31 to -32.

ZOUT[5] is 0 if the g direction is positive, 1 if the g direction is negative.

If the Alert bit is set, the register was read at the same time as the device was attempting to update the contents. The register

must be read again.

Table 9. User Register Summary

Address

Name

Definition

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

$00

XOUT

6-bit output value X

-

Alert

XOUT[5]

XOUT[4]

XOUT[3]

XOUT[2]

XOUT[1]

XOUT[0]

$01

YOUT

6-bit output value Y

-

Alert

YOUT[5]

YOUT[4]

YOUT[3]

YOUT[2]

YOUT[1]

YOUT[0]

$02

ZOUT

6-bit output value Z

-

Alert

ZOUT[5]

ZOUT[4]

ZOUT[3]

ZOUT[2]

ZOUT[1]

ZOUT[0]

$03

TILT

Tilt Status

Shake

Alert

Tap

PoLa[2]

PoLa[1]

PoLa[0]

BaFro[1]

BaFro[0]

$04

SRST

Sampling Rate Status

0

0

0

0

0

0

AWSRS

AMSRS

$05

SPCNT

Sleep Count

SC[7]

SC[6]

SC[5]

SC[4]

SC[3]

SC[2]

SC[1]

SC[0]

$06

INTSU

Interrupt Setup

SHINTX

SHINTY

SHINTZ

GINT

ASINT

PDINT

PLINT

FBINT

$07

MODE

Mode

IAH

IPP

SCPS

ASE

AWE

TON

-

MODE

$08

SR

Auto-Wake/Sleep and

Portrait/Landscape samples

per seconds and Debounce

Filter

FILT[2]

FILT[1]

FILT[0]

AWSR[1]

AWSR[0]

AMSR[2]

AMSR[1]

AMSR[0]

$09

PDET

Tap Detection

ZDA

YDA

XDA

PDTH[4]

PDTH[3]

PDTH[2]

PDTH[1]

PDTH[0]

$0A

PD

Tap Debounce Count

PD[7]

PD[6]

PD[5]

PD[4]

PD[3]

PD[2]

PD[1]

PD[0]

$0B-$1F

Factory

Reserved

-

-

-

-

-

-

-

-

D7

D6

D5

D4

D3

D2

D1

D0

-

Alert

XOUT[5]

XOUT[4]

XOUT[3]

XOUT[2]

XOUT[1]

XOUT[0]

0

0

00

0000

D7

D6

D5

D4

D3

D2

D1

D0

-

Alert

YOUT[5]

YOUT[4]

YOUT[3]

YOUT[2]

YOUT[1]

YOUT[0]

0

0

00

00

0

0

D7

D6

D5

D4

D3

D2

D1

D0

-

Alert

ZOUT[5]

ZXOUT[4]

ZOUT[3]

ZOUT[2]

ZOUT[1]

ZOUT[0]

0

0

0

0

00

00