Renesas H8S Series Hardware Manual page 850

Section 21 Flash Memory (0.18-µm F-ZTAT Version)
All of these commands, except for boot program status inquiry (H'4F), will be valid until the boot
program receives the programming/erasing state transition command (H'40). The host can choose
the needed commands out of the above commands and make inquiries. The boot program status
inquiry command (H'4F) remains valid even after the boot program has received the
programming/erasing state transition command (H'40).
(a) Supported Device Inquiry
The boot program will return the device codes of the supported devices and the product names in
response to the supported device inquiry command.
Command H'20
• Command, H'20 (1 byte): Inquiry regarding supported devices
Response H'30
Number of
characters
···
SUM
• Response, H'30 (1 byte): Response to the supported device inquiry
• Size (1 byte): The number of bytes to be transferred, excluding the command, size, and
checksum, that is, the total amount of data consisting the number of devices, the number of
characters, device codes, and product names
• Number of devices (1 byte): The number of device types supported by the boot program in the
microcomputer
• 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 supported product name
• Product name (n bytes): ASCII code of the boot program type name
• 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.
Rev. 3.00 Jul. 14, 2005 Page 802 of 986
REJ09B0098-0300
Size Number of devices
Device code Product name