Hitachi SH7760 Solution Engine2 Overview page 56

6.2.8 Normal Response during a Write Operation
Figure 6.10 shows the response format for the write command. The power supply controller returns an ACK
code, a function code, a register address and target data, in this order, as a response for the write command.
(1) ACK code
(1 byte)
(1) ACK code
This code is fixed at ACK (0x06).
(2) Function code
The same code as for the write command returns.
(3) Register address
The address of a register subject to a write operation returns.
(4) Data
Write data returns. The size of this data is equal to the value specified in the function code. However, note that
no data returns for IRRSFDR subject to infrared remote control and EEPDR subject to serial EEPROM control.
(2) Function code
(1 byte or 2 byte)
Figure 6.10 Normal Response during a Write Operation
(3) Register address
(2 byte)
53
(4) Data
(N byte)