p2125vps20 Renesas Electronics Corporation., p2125vps20 Datasheet - Page 563

• Manufacturer Part Number: p2125vps20
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

(b) Device Selection
The boot program will set the specified supported device in response to the device selection
command. The program will return information on the selected device in response to the inquiry
after this setting has been made.
Command
• Command, H'10 (1 byte): Device selection
• Size (1 byte): The number of characters in the device code. Fixed at 4.
• Device code (4 bytes): Device code (ASCII code) returned in response to the supported device
• SUM (1 byte): Checksum
Response
• Response, H'06 (1 byte): Response to the device selection command.
Error Response
• Error response, H'90 (1 byte): Error response to the device selection command
(c)
The boot program will return the supported clock modes in response to the clock mode inquiry
command.
Command
• Command, H'21 (1 byte): Inquiry regarding clock mode
Response
• Response, H'31 (1 byte): Response to the clock mode inquiry
• Size (1 byte): Amount of data that represents the number of modes and modes
• Number of clock modes (1 byte): The number of supported clock modes.
• Mode (1 byte): Values of the supported clock modes (i.e. H'01 means clock mode 1.)
• SUM (1 byte): Checksum
inquiry
The boot program will return ACK when the device code matches.
ERROR (1 byte): Error code
H'00 indicates no clock mode or the device allows the clock mode to be read.
Clock Mode Inquiry
H'11: Checksum error
H'21: Device code error, that is, the device code does not match
H'10
H'06
H'21
H'31
H'90
Size
Size
ERROR
Number of modes
Device code
Section 19 Flash Memory (0.18-µm F-ZTAT Version)
Mode
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Rev. 1.00 Sep. 21, 2006 Page 525 of 658
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