h8s-2138 Renesas Electronics Corporation., h8s-2138 Datasheet - Page 649

• Manufacturer Part Number: h8s-2138
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Note: If a memory cell does not operate normally and cannot be erased, one H'FF byte is
After bit rate adjustment, transmits
continuously at prescribed bit rate
of H'00 data transmitted by host
if data has already been written,
Host confirms normal reception
Set pins to boot program mode
indication (H'00), and transmits
memory data has been erased,
Check flash memory data, and
MCU transmits one H'AA data
Section 21 ROM
one H'00 data byte to host to
sets value in bit rate register
After confirming that all flash
MCU calculates bit rate and
MCU measures low period
MCU transfers part of boot
indicate end of adjustment
of bit rate adjustment end
Host transfers data (H'00)
and execute reset-start
transmitted as an erase error, and the erase operation and subsequent operations
are halted.
After receiving H'55,
one H'55 data byte
program to RAM
erase all blocks
byte to host
Start
(Mask ROM Version, H8S/2138 F-ZTAT, H8S/2134 F-ZTAT, and H8S/2132 F-ZTAT)
Figure 21.8 Boot Mode Execution Procedure
Transmit one H'AA data byte to host,
upper byte followed by lower byte
program transferred to on-chip RAM
number of bytes to host as verify
control program to on-chip RAM
Transfer received programming
and execute programming control
program to host as verify data
MCU transmits received user
Host transmits user program
of user program bytes (N),
sequentially in byte units
MCU transmits received
Host transmits number
End of transmission
data (echo-back)
Rev. 4.00 Jun 06, 2006 page 595 of 1004
(echo-back)
n = N?
n = 1
Yes
No
REJ09B0301-0400
n + 1
n