Datasheet

Section 7 ROM
Page 182 of 982 REJ09B0465-0300 Rev. 3.00
Sep 17, 2010
H8S/20103, H8S/20203, H8S/20223, H8S/20115, H8S/20215, H8S/20235 Group
(b) Device Selection
In response to a device selection command, the boot program sets the specified supported device
as the selected device. The boot program will return the information on the selected device in
response to the subsequent inquiries.
Command H'10 Size Device code SUM
• Command H'10 (1 byte): Device selection
• Size (1 byte): The number of characters in the device-code field (fixed to four).
• Device code (4 bytes): The device code that has been returned in response to a supported-
device inquiry command (ASCII code)
• SUM (1 byte): Checksum
Response H'06
• Response H'06 (1 byte): Response to a device selection command
The ACK code is returned when the specified device code corresponds to one of the supported
devices.
Error response
H'90 ERROR
• Error response H'90 (1 byte): Error response to a device selection command
• ERROR (1 byte): Error code
H'11: Checksum error
H'21: Device code error indicating device code disagreement
(c) Clock Mode Inquiry
In response to a clock mode inquiry, the boot program returns the information on the selectable
clock modes.
Command H'21
• Command H'21 (1 byte): Clock mode inquiry
Response H'31 Size Mode … SUM