Sensors

Freescale Semiconductor, Inc.

35

MMA16xxKW

4.2.1.5

Request ID Information Command

The Request ID Information command is supported in the following command formats:

• Standard Long Command

• Standard Short Command

• Enhanced Long Command as configured by the Format Control Command (Reference Section 4.2.1.11)

• Enhanced Short Command as configured by the Format Control Command (Reference Section 4.2.1.11)

The device ignores the Request ID Information command if the DSI device address is set to the DSI Global Device Address

of ‘0000’. The data bits D[7:0] in the command are only used in the CRC calculation.

4.2.1.6

DSI Command #5

DSI Command ‘0101’ is not implemented. The device ignores all command formats with a command ID of ‘0101’.

4.2.1.7

DSI Command #6

DSI Command ‘0110’ is not implemented. The device ignores all command formats with a command ID of ‘0110’.

Table 27. Request ID Information Command

Data

Address

Command

CRC

D[7]

D[6]

D[5]

D[4]

D[3]

D[2]

D[1]

D[0]

A[3]

A[2]

A[1]

A[0]

C[3]

C[2]

C[1]

C[0]

⎯

⎯

⎯

⎯

⎯

⎯

⎯

⎯

A[3]

A[2]

A[1]

A[0]

0100

0 to 8 bits

Table 28. Request ID Information Command Bit Definitions

Bit Field

Definition

C[3:0]

Request ID Information Data Command = ‘0100’

A[3:0]

DSI device address. This field contains the device address. This field must match the internal programmed address field. Otherwise, the

command is ignored.

D[7:0]

Used for CRC calculation only

Table 29. Short Response - Request ID Information Command

Response

CRC

D[14]

D[13]

D[12]

D[11]

D[10]

D[9]

D[8]

D[7]

D[6]

D[5]

D[4]

D[3]

D[2]

D[1]

D[0]

0

0

0

0

0

0

0

V2

V1

V0

0

DEVID

1

0

0

0 to 8 bits

Table 30. Long Response - Request ID Information Command

Response

CRC

D[15]

D[14]

D[13]

D[12]

D[11]

D[10]

D[9]

D[8]

D[7]

D[6]

D[5]

D[4]

D[3]

D[2]

D[1]

D[0]

A[3]

A[2]

A[1]

A[0]

0000

V[2]

V[1]

V[0]

0

DEVID

100

0 to 8 bits

Table 31. Request ID Response Bit Definitions

Bit Field

Definition

D[4:0] = {1’b0,DEVID, 3’b100}

Device Identifier:‘00100’, or ‘01100’

DEVID: Bit 7 of the DEVCFG regIster

V[2:0]

Version ID. This field indicates the device / silicon revision of the device.

A[3:0]

DSI device address. This field contains the device address.

Shaded bits are transmitted to meet the response message length of the received message