h8s-2635 Renesas Electronics Corporation., h8s-2635 Datasheet - Page 816

• Manufacturer Part Number: h8s-2635
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Section 21A ROM (H8S/2636 Group)
Rev. 6.00 Feb 22, 2005 page 756 of 1484
REJ09B0103-0600
Note: If a memory cell does not operate normally and cannot be erased, one H'FF byte is
continuously at prescribed bit rate
host to indicate end of adjustment
Chip calculates bit rate and sets
Host confirms normal reception
transmits one H'00 data byte to
indication (H'00), and transmits
Chip measures low period of
H'00 data transmitted by host
After bit rate adjustment, chip
of bit rate adjustment end
Host transfers data (H'00)
value in bit rate register
and execute reset-start
LSI transmits one H'AA
Set pins to boot mode
transmitted as an erase error, and the erase operation and subsequent operations
are halted.
After receiving H'55,
one H'55 data byte
data byte to host
Start
Figure 21A-8 Boot Mode Execution Procedure
Host transmits programming control
program transferred to on-chip RAM
program sequentially in byte units
of programming control program
Chip transmits received number
programming control program to
control program to on-chip RAM
if data has already been written,
Transfer received programming
memory data has been erased,
host as verify data (echo-back)
Check flash memory data, and
bytes (N), upper byte followed
of bytes to host as verify data
chip transmits one H'AA data
Execute programming control
After confirming that all flash
Chip transmits received
Host transmits number
End of transmission
erase all blocks
by lower byte
(echo-back)
byte to host
n = N?
n = 1
Yes
No
n + 1 → n