ISL68224IRAZ datasheet(39/97 Pages) RENESAS

39 / 97 page

ISL68224

10. PMBus Command Detail

FN9297 Rev.1.00

Page 39 of 96

Oct.1.20

10.7 PAGE_PLUS_READ (06h)

Definition: Sets the page within a device, sends a command, and reads the data returned by the command in

one packet.

Access: Paged

Data Format: Bit Field

Type: Block Read

The PAGE_PLUS_READ command uses the BLOCK WRITE – BLOCK READ PROCESS CALL protocol.

Figure 30 shows an example of the PAGE_PLUS command being used to send a command that has two data

bytes to be read and a PEC byte.

10.8 WRITE_PROTECT (10h)

Definition: Sets the write protection of certain configuration commands.

Access: Global

Data Length in Bytes: 1

Data Format: Bit Field

Type: R/W

Default Value: 00h (enable all writes)

Figure 30. PAGE_PLUS_READ Command with a PEC Byte

Command

WRITE_PROTECT (10h)

Format

Bit Field

Bit Position

Access

R/W

Function

See Following Table

Default Value

000

Bits 7:0

Protection

1000 0000

Disable all writes except to WRITE_PROTECT command.

0100 0000

Disable all writes except to WRITE_PROTECT, OPERATION, and PAGE.

0010 0000

Disable all writes except to WRITE_PROTECT, OPERATION, PAGE, ON_OFF_CONFIG, and VOUT_COMMAND.

0000 0010

Disable all writes except to WRITE_PROTECT, OPERATION, PAGE, ON_OFF_CONFIG, VOUT_COMMAND, and

DMA.

0000 0000

Enable all writes

Note: Any settings other than the five shown result in an invalid data fault.

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