Sensors

Freescale Semiconductor, Inc.

7

MMA690xKQ

SECTION 2 INTERNAL MODULES

2.1

DATA ARRAY

A 400-bit data array allows each device to be customized. The array interface incorporates parity circuitry for fault detection

along with a locking mechanism, to prevent unintended changes. Portions of the array are reserved for factory-programmed trim

values. Customer accessible data stored in the array are shown in the Table 2-1.

Addresses $00 - $0D are associated with the data array. A writable register at address $0E is provided for device control

operations. Two read-only registers at addresses $0F and $10 provide status information.

Unused bits within the data array are always read as ‘0’ values. Unprogrammed OTP bits are also read as ‘0’ values.

F: Factory programmed OTP location

R: Read-only register

R/W: Read/write register

N/A: Not applicable

Table 2-1. DSP Configuration Register

Location

Bit Function

Type

Addr

Register

7

6

5

4

3

2

1

0

$00

SN0

SN[7]

SN[6]

SN[5]

SN[4]

SN[3]

SN[2]

SN[1]

SN[0]

F/R

$01

SN1

SN[15]

SN[14]

SN[13]

SN[12]

SN[11]

SN[10]

SN[9]

SN[8]

$02

SN2

SN[23]

SN[22]

SN[21]

SN[20]

SN[19]

SN[18]

SN[17]

SN[16]

$03

SN3

SN[31]

SN[30]

SN[29]

SN[28]

SN[27]

SN[26]

SN[25]

SN[24]

$04

DEVCFG0

0

0

0

0

RNG[3]

RNG[2]

RNG[1]

RNG[0]

F/R

$05

DEVCFG1

0

0

0

0

RNG[3]

RNG[2]

RNG[1]

RNG[0]

$06

DEVCFG2

0

0

0

0

0

0

0

0

$07

DEVCFG3

0

0

0

0

0

0

0

0

$08

DEVCFG4

0

0

0

0

0

0

0

0

$09

DEVCFG5

1

0

1

0

0

0

0

0

$0A

AXCFG_X

1

0

0

1

0

1

0

1

F/R

$0B

AXCFG_Y

1

0

0

1

0

1

0

1

$0C

Unused

N/A

$0D

DSPCFG

0

0

1

0

0

1

0

0

F/R

$0E

DEVCTL

RES_1

RES_0

CE

PCM_EN

HPFB

YINV

ST1

ST0

R/W

$0F

TEMP

TEMP[7]

TEMP[6]

TEMP[5]

TEMP[4]

TEMP[3]

TEMP[2]

TEMP[1]

TEMP[0]

R

$10

DEVSTAT

IDE

OSCF

DEVINIT

TF

0

0

0

DEVRES

$11

COUNT

COUNT[7]

COUNT[6]

COUNT[5]

COUNT[4]

COUNT[3]

COUNT[2]

COUNT[1]

COUNT[0]

$24

ACC_X11L

ACC_X[7]

ACC_X[6]

ACC_X[5]

ACC_X[4]

ACC_X[3]

ACC_X[2]

ACC_X[1]

ACC_X[0]

$25

ACC_X11H

0

0

0

0

0

ACC_X[10]

ACC_X[9]

ACC_X[8]

$26

ACC_Y11L

ACC_Y[7]

ACC_Y[6]

ACC_Y[5]

ACC_Y[4]

ACC_Y[3]

ACC_Y[2]

ACC_Y[1]

ACC_Y[0]

$27

ACC_Y11H

0

0

0

0

0

ACC_Y[10]

ACC_Y[9]

ACC_Y[8]