HD64F2168 Datasheet, PDF (715/874 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer

the needed commands out of the commands and inquiries listed above. The boot program status
inquiry command (H'4F) is valid after the boot program has received the programming/erasing
transition command (H'40).
(a) Supported Device Inquiry
The boot program will return the device codes of supported devices and the product code in
response to the supported device inquiry.
Command H'20
• Command, H'20, (1 byte): Inquiry regarding supported devices
Response
H'30
Number of
characters
Size Number of devices
Device code
Product name
···
SUM
• Response, H'30, (1 byte): Response to the supported device inquiry
• Size (1 byte): Number of bytes to be transmitted, excluding the command, size, and checksum,
that is, the amount of data contributes by the number of devices, characters, device codes and
product names
• Number of devices (1 byte): The number of device types supported by the boot program
• Number of characters (1 byte): The number of characters in the device codes and boot
program’s name
• Device code (4 bytes): ASCII code of the supporting product
• Product name (n bytes): Type name of the boot program in ASCII-coded characters
• SUM (1 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.
(b) 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, (1 byte): Device selection
• Size (1 byte): Amount of device-code data
This is fixed at 2
• Device code (4 bytes): Device code (ASCII code) returned in response to the supported device
inquiry
• SUM (1 byte): Checksum
Rev. 3.00, 03/04, page 675 of 830