h8s-2172 Renesas Electronics Corporation., h8s-2172 Datasheet - Page 474

• Manufacturer Part Number: h8s-2172
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family H8s-2100 Series
• Manufacturer: Renesas Electronics Corporation.

(d) Clock Mode Selection
The boot program will set the specified clock mode. The program will return the selected clock-
mode information after this setting has been made.
The clock-mode selection command should be sent after the device-selection commands.
• Command, H'11, (one byte): Selection of clock mode
• Size (one byte): Amount of data that represents the modes
• Mode (one byte): A clock mode returned in reply to the supported clock mode inquiry.
• SUM (one byte): Checksum
• Response, H'06, (one byte): Response to the clock mode selection command
• Error response, H'91, (one byte) : Error response to the clock mode selection command
• ERROR
Even if the clock mode numbers are H'00 and H'01 by a clock mode inquiry, the clock mode must
be selected using these respective values.
(e) Multiplication Ratio Inquiry
The boot program will return the supported multiplication and division ratios.
• Command, H'22, (one byte): Inquiry regarding multiplication ratio
Rev. 2.00, 03/04, page 442 of 534
Command
Response
Error Response
Command
Response
ACK will be returned when the clock mode matches.
H'11
H'06
H'22
H'32
Number of
multiplication ratios
···
SUM
H'11: Checksum error
H'22: Clock mode error, that is, the clock mode does not match.
: (one byte): Error code
H'91
Size
ERROR
Mode
Size
Multiplica-
tion ratio
SUM
Number
of types
···