D12320VF25V Datasheet, PDF (794/1146 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 17 ROM
• Device code (4 bytes): Device code returned in response to the supported device inquiry
(ASCII-code)
• SUM (1 byte): Checksum
Response H'06
• Response, H'06, (1 byte): Response to the device selection command
ACK will be returned when the device code matches.
Error
response
H'90
ERROR
• Error response, H'90, (1 byte): Error response to the device selection command
• Error: (1 byte): Error code
H'11: Sum check error
H'21: Device code error, that is, the device code does not match
(3) Clock Mode Inquiry
The boot program will return the supported clock modes in response to the clock mode inquiry.
Command H'21
• Command, H'21, (1 byte): Inquiry regarding clock mode
Response H'31 Size Mode SUM
• Response, H'31, (1 byte): Response to the clock-mode inquiry
• Size (1 byte): Amount of data that represents the modes
• Mode (1 byte): Values of the supported clock modes (i.e. H'01 means clock mode 1.)
• SUM (1 byte): Checksum
(4) Clock Mode Selection
The boot program will set the specified clock mode. The program will return the selected clock-
mode information after this setting has been made.
The clock-mode selection command should be sent after the device-selection commands.
Command H'11 Size Mode SUM
• Command, H'11, (1 byte): Selection of clock mode
• Size (1 byte): Amount of data that represents the modes
• Mode (1 byte): A clock mode returned in reply to the supported clock mode inquiry.
• SUM (1 byte): Checksum
Rev.7.00 Feb. 14, 2007 page 760 of 1108
REJ09B0089-0700