Analog Integrated Circuit Device Data

24

Freescale Semiconductor

33797

FUNCTIONAL DEVICE OPERATION

OPERATIONAL MODES

Table 8. Command Programming and Diagnostic Bit Definitions

Hex

Code

Command

Description

Command Programming Input and Diagnostic Data Out (Available on Next Command) (21)

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

3X

Current

Measurement

Register Reset

Command for

Squib X

Current 1=ON

0

0

1

1

SQB_2B

Data/Timer

Reset

SQB_2A

Data/Timer

Reset

SQB_1B

Data/Timer

Reset

SQB_1A

Data/Timer

Reset

DATA OUT

Squib X Current

Register Reset

Status

0

0

1

1

SQB_2B

Data/Timer

Reset

SQB_2A

Data/Timer

Reset

SQB_1B

Data/Timer

Reset

SQB_1A

Data/Timer

Reset

80

Unlock for FEN 1

Counter Registers

Programming.

1

0

0

0

0

0

0

0

Response DATA

Output: Command

Echoed

1

0

0

0

0

0

0

0

XX

Programming

Command for

FEN 1 Counter

1=ON

FEN1 CNT

BIT 7

MSB

FEN1 CNT

BIT 6

FEN1 CNT

BIT 5

FEN1 CNT

BIT 4

FEN1 CNT

BIT 3

FEN1 CNT

BIT 2

FEN1 CNT

BIT 1

FEN1 CNT

BIT 0

LSB

Response DATA

OUT

FEN 1 Counter

Programming

Status

FEN1 CNT

BIT 7

MSB

FEN1 CNT

BIT 6

FEN1 CNT

BIT 5

FEN1 CNT

BIT 4

FEN1 CNT

BIT 3

FEN1 CNT

BIT 2

FEN1 CNT

BIT 1

FEN1 CNT

BIT 0

LSB

81

Unlock for FEN 2

Counter Registers

Programming

1

0

0

0

0

0

0

1

Response DATA

Output: Command

Echoed

1

0

0

0

0

0

0

1

Notes

21

The second byte for command programming will be treated as a NOP if any FET is firing. The programming commands have to be

sequential or they will be treated as a NOP.