SH7055S Datasheet, PDF (850/1002 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7000 Series

Error response H'90 ERROR
 Error response: H'90 (one byte): Error response to the device selection command
 ERROR: (one byte): Error code
H'11: Sum check error
H'21: Device code mismatch error
(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 (one byte): Inquiry regarding clock mode
Response H'31 Size Number of modes Mode SUM
 Response: H'31 (one byte): Response to the clock-mode inquiry
 Size (one byte): Amount of data that represents the number of modes and modes
 Number of modes (one byte): Number of supported clock modes
H'00 indicates no clock mode or the device allows the clock mode to be read.
 Mode (one byte): Supported clock modes (i.e. H'01 means clock mode 1.)
 SUM (one 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 command.
Command H'11 Size Mode SUM
 Command: H'11 (one byte): Selection of clock mode
 Size (one byte): Number of characters that represents the mode (fixed at 1)
 Mode (one byte): Clock mode returned in reply to the supported clock mode inquiry.
 SUM (one byte): Checksum
Response H'06
 Response: H'06 (one byte): Response to the clock-mode selection command
ACK will be returned when the clock mode matches.
Error response H'91 ERROR
 Error response: H'91 (one byte): Error response to the clock-mode selection command
 ERROR (one byte): Error code
H'11: Sum check error
H'22: Clock mode mismatch error
(5) Multiplication Ratio Inquiry
The boot program will return the supported multiplication/division ratios.
Rev.2.0, 07/03, page 812 of 960