USB-TO-GPIO datasheet(48/50 Pages) TI1

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B.21 Assert/Deassert CONTROL Lines Command and Response

B.22 Poll PMBUS Signal Lines Command and Response

Assert/Deassert CONTROL Lines Command and Response

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

Bit logic 1 for

Assert/Deassert

Bit 0 for line 1,

assert,

CONTROL

0x0C

…,

bit logic 0 for

Lines

bit 4 for line 5

deassert

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

Assert/Deassert

Success: 0

0x8C

CONTROL

Fail: 1

Lines

Each CONTROL line can be used to enable/disable the powering up of one of multiple slaves.

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

Poll PUMBUS

0x0F

Signal Lines

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

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

Note that there is currently no support for RESET signal or WRITE_PROTECT signal.

PMBUS/SMBUS Communications

SLLU093 – August 2006

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