SH7055S Datasheet, PDF (849/1002 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7000 Series

inquiry command (H'4F) is valid after the boot program has received the programming/erasing
transition command (H'40).
(1) Supported device inquiry
The boot program will return the device codes of supported devices in response to the
supported device inquiry.
Command H'20
 Command: H'20 (one byte): Inquiry regarding supported devices
Response H'30
Size Number of devices
Number of
characters
Device code
Product name
...
SUM
 Response: H'30 (one byte): Response to the supported device inquiry
 Size (one byte): Number of bytes to be transmitted, excluding the command, amount of
data, and checksum, that is, the amount of data consists of the product names, the number
of devices, characters, and device codes
 Number of devices (one byte): Number of device types supported by the boot program
 Number of characters (one byte): Number of characters in the device code and boot
program's name
 Device code (four bytes): Supporting product (ASCII code)
 Product name (n bytes): Type name of the boot program (ASCII code)
 SUM (one byte): Checksum
The checksum is calculated so that the total number of all values from the command byte to
the SUM byte becomes H'00.
(2) Device Selection
The boot program will set the supported device to the specified device code. The program will
return the selected device code in response to the inquiry after this setting has been made.
Command
H'10
Size
Device code SUM
 Command: H'10 (one byte): Device selection
 Size (one byte): Number of characters in the device code (fixed at 2)
 Device code (four bytes): Device code returned in response to the supported device inquiry
(ASCII code)
 SUM (one byte): Checksum
Response H'06
 Response: H'06, (one byte): Response to the device selection command
ACK will be returned when the device code matches.
Rev.2.0, 07/03, page 811 of 960