Sony SS-HQ1 Application Notes page 240

Reception Command Specification (DSP -> External Microcomputer)
Table 12.4-3 Reception Command Specification for Communication with External Microcomputers
Function
Specify and read
register category
Specify and write
register category
Specify and read
EEPROM category
Specify and write
EEPROM category
Specify and read actual
EEPROM address
Specify and write actual
EEPROM address
Write all to EEPROM
<Explanation of Command Reception Specification>
Data of first byte
Data of second byte
BYTEn Number of bytes to write/read
<Error codes>
FCH Communication error (overrun or other protocol violation)
F0H Error in number of valid bytes for transmission
F1H Command code error
F2H Category number error
F3H Byte number error
F4H Illegal access (communication data out of range, etc.)
F5H EEPROM busy
If an error code is sent, no bytes after the second byte are sent.
1
BYTEn+1
BYTEn+1
BYTEn+1
02h
BYTEn+1
02h
02h
Total number of valid bytes in a packet; otherwise, an error code (Fnh)
Dummy (01h), read data, or echo back (write data)
Communication format (in bytes)
2 3
Read data (the specified amount)
Write data
(the specified amount)
Read data (the specified amount)
01h
Read data (the specified amount)
01h
01h
234
- SS-HQ1 Application Notes -
Ver.1.0.0 January 7, 2005
4-32