3069RF-ZTAT Datasheet, PDF (671/1003 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER

certainly be needed. When two or more selection commands are sent at once, the last command
will be valid.
All of these commands, except for the boot program status inquiry command (H'4F), will be valid
until the boot program receives the programming/erasing transition (H'40). The host can choose
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).
(1) Supported device inquiry
The boot program will return the device codes of supported devices and the product code of the
F-ZTAT in response to the supported device inquiry.
Command H'20
 Command, H'20, (1 byte) : Inquiry regarding supported devices
Response
H'30
A number of
characters
···
Size
A 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, amount of data,
and checksum, that is, the amount of data contributes by the product names, the number of
devices, characters, and device codes
 A number of devices (1 byte) : The number of device types supported by the boot program
 A number of characters (1 byte) : The number of characters in the device codes and boot
program’s name
 Device code (4 bytes) : 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.
(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
 Command, H'10, (1 byte) : Device selection
SUM
Rev. 5.0, 09/04, page 649 of 978