USB-TO-GPIO datasheet(42/50 Pages) TI1

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B.9

List of USB Interface Adapter to Host PC Response Commands

Table B-2. USB Interface Adapter to Host PC Response Commands

USB PACKET

COMMAND

BYTE 0

USB PACKET USB PACKET

USB PACKET USB PACKET USB PACKET

USB PACKET

COMMENTS

DESCRIPTION

COMMAND

BYTE 1

BYTE 2

BYTE 3

BYTE 4

BYTE 5

BYTES 6–63

CODE

Response from

Success: 0

0x81

Send Byte

Fail: 1

Response from

Success: 0

Byte read

0x82

Receive Byte

Fail: 1

from slave

Response from

Success: 0

0x83

Write Byte

Fail: 1

Response from

Success: 0

0x84

Write Word

Fail: 1

Response from

Success: 0

Byte read

0x85

Read Byte

Fail: 1

from slave

Low byte of

High byte of

Response from

Success: 0

0x86

word read

Read Word

Fail: 1

from slave

Low byte of

High byte of

Response from

Success: 0

0x87

word read

Process Call

Fail: 1

from slave

Response from

Success: 0

0x88

Block Write

Fail: 1

Response from

Success: 0

0x89

X number of bytes read from slave (up to 32 bytes)

Block Read

Fail: 1

Response from

Block Read –

Success: 0

0x8A

X number of bytes read from slave (up to 31 bytes)

Block Write

Fail: 1

Process Call

Response from

Success: 0

Group

0x8B

Fail: 1

Command

Response from

Assert/Deassert

Success: 0

0x8C

CONTROL

Fail: 1

Lines

Bit 0 for

CONTROL 1,

…,

Response from

bit 4 for

Logic high for

Poll PMBUS

0x8F

CONTROL 5,

1, logic low for

Signal Lines

bit 5 for

ALERT,

bits 6 and 7

not used

Response from

Success: 0

Turn On/Off

0x91

Fail: 1

PEC

See the following sections for detailed explanation of each command.

PMBUS/SMBUS Communications

SLLU093 – August 2006

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