Sensors

Freescale Semiconductor, Inc.

15

MMA16xxKW

3.1.3

Device Configuration Register (DEVCFG)

The Device configuration register is a user programmable OTP register which contains device configuration information. This

register is included in the user register CRC check. Refer to Section 3.2.2 for details regarding the CRC for the user programma-

ble OTP array.

3.1.3.1

Device ID Bit (DEVCFG[7])

The Device ID Bit is a user programmable bit which allows the user to select between 2 device IDs. The Device ID is trans-

mitted in response to the Request ID DSI command. Reference Section 4.2.1.5 for more information regarding the Request ID

DSI command. This bit can be factory or user programmed.

3.1.3.2

User Configuration CRC (CRC_U[2:0], DEVCFG[2:0])

The User Configuration CRC bits contain the 3-bit CRC used for verification of the user programmable OTP array. Reference

Section 3.2.2 for details regarding the CRC for the user programmable OTP array. These bits can be factory or user programmed.

3.1.4

Device Configuration Register 1 (DEVCFG1)

The Device configuration register is a user programmable OTP register which contains device configuration information. This

register is included in the user register CRC check. Refer to Section 3.2.2 for details.

3.1.4.1

User Specific Data 00 Bits (UD00[5:0], DEVCFG1[7:2])

The User Specific Data bits have no impact on the device function or performance. The bits can be programmed with user or

assembly specific information. These bits can be factory or user programmed.

3.1.4.2

Attribute Bits (AT_OTP[1:0], DEVCFG1[1:0])

The Attribute Bits are user defined bits which are transmitted in response to the Request Status, Disable Self-Test Stimulus or

Enable Self-Test Stimulus DSI commands. The transmitted values are qualified by the LOCK_U bit as shown in the table below.

These bits can be factory or user programmed.

Table 4. Device Control Register

Location

Bit

RA[3:0]

Register

WA[3:0]

7

6

5

4

WA[3:0]

3

2

1

0

$05

DEVCFG

Bnk0 $0A

DEVID

000

Bnk0 $09

0

CRC_U[2] CRC_U[1] CRC_U[0]

Factory Default

1000

0000

DEVID

Device ID

0

‘00110’

1

‘00100’

Table 5. Device Control Register 1

Location

Bit

RA[3:0]

Register

WA[3:0]

7

6

5

4

WA[3:0]

3

2

1

0

$06

DEVCFG1

Bnk2 $06

UD00[5]

UD00[4]

UD00[3]

UD00[2]

Bnk1 $06

UD00[1]

UD00[0]

AT_OTP[1] AT_OTP[0]

Factory Default

0000

0000

LOCK_U

DEVCFG1 Values

DSI Transmitted Values

AT_OTP[1]

AT_OTP[0]

AT[1]

AT[0]

0X

X

1

0

1

0000

0101

1010

1111