p2125vps20 Renesas Electronics Corporation., p2125vps20 Datasheet - Page 580

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

Section 19 Flash Memory (0.18-µm F-ZTAT Version)
(11) Memory Read
The boot program will return the data in the specified address in response to the memory read
command.
Command
• Command, H'52 (1 byte): Memory read
• Size (1 byte): Amount of data that represents the area, read address, and read size (fixed at 9)
• Area (one byte)
• Read address (4 bytes): Start address to be read from
• Read size (4 bytes): Size of data to be read
• SUM (1 byte): Checksum
Response
• Response: H'52 (1 byte): Response to memory read
• Read size (4 bytes): Size of data to be read
• Data (n bytes): Data of the read size from the read address
• SUM (1 byte): Checksum
Error Response
• Error response: H'D2 (1 byte): Error response to memory read
• ERROR (1 byte): Error code
(12) User Boot MAT Sum Check
The boot program will return the total amount of bytes of the user boot MAT contents in response
to the user boot MAT sum check command.
Rev. 1.00 Sep. 21, 2006 Page 542 of 658
REJ09B0310-0100
H'00: User boot MAT
H'01: User MAT
An address error occurs when the area setting is incorrect.
H'11: Checksum error
H'2A: Address error
H'2B: Size error
H'52
Read size
H'52
Data
SUM
The read address is not in the MAT.
The read size exceeds the MAT.
H'D2
Size
Read size
···
ERROR
Area
Read address
SUM