USB-TO-GPIO datasheet(16/50 Pages) TI1

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3.7

EEPROM Read Command and Response

3.8

Set Pullup Resistors Command and Response

EEPROM Read 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

A = Starting

B = Starting

C (# of bytes

EEPROM Read

0x19

≤ 60

address MSB

address LSB

to read)

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

0x99

C number of bytes read back from EEPROM (up to 32 bytes)

EEPROM Read

Fail: 1

This command works with the EEPROM Program command to verify if the firmware image has been

programmed into the EEPROM correctly. For the best efficiency, try to read a block of 32 bytes at a time

by calling this command.

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

0x00 for no

pullups

(switched off),

0x01 for

2.2 k

Ω, 0x02

Set Pullup

for 1 k

Ω, 0x03

0x1A

A (for SDA)

B (for SCL)

C (for ALERT)

Resistors

for 688

Ω.

For ALERT,

the option is

either open

(0x00) or

2.2 k

Ω (0x01).

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

Pullups have

Success: 0

Set Pullup

0x9A

been

Fail: 1

Resistors

configured

Byte A is for the DATA line for I2C, PMBUS, or SMBUS communications; byte B is for the CLOCK line for

I2C, PMBUS, or SMBUS communications; byte C is for the ALERT line for PMBUS communications. If a

slave device can provide one or multiple pullup resistors, switch off the pullups for DATA, SCL, or ALERT

line accordingly.

Firmware Programming and Communications Protocol

SLLU093 – August 2006

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