Hitachi H*/3694F-ZTAT User Manual

Rev. 1.0, 07/01, page 88 of 372

Branches to boot program at reset-start.

Bit rate
adjustment

Continuously transmits data H'00 at
specified bit rate.

· Measures low-level period of receive data H'00.
· Calculates bit rate and sets it in BRR of SCI3.
· Transmits data H'00 to the host to indicate that the 
  adjustment has ended.

Transmits 1-byte data H'AA to the host when data 
 H'55 is received.

Transmits data H'55 when data H'00
is received and no error occurs.

Transmits number of bytes (N) of
programming control program to be
transferred as 2-byte data (low-order
byte following high-order byte)

Transmits 1-byte programming
control program

Transfer of
programming control 
program

Execution of 
Programming 
control program

Transfer of
programming control 
program (repeated for
N times)

Flash memory erase

Echobacks the 2-byte received data to host.

Branches to programming control program
transferred to on-chip RAM and starts execution.

Echobacks received data to host and also
transfers it to RAM.

Checks flash memory data, erases all flash memory 
blocks in case of written data existing, and transmits 
data H'AA to host. (If erase could not be done,
transmits data H'FF to host and aborts operation.)

19,200 bps

16MHz

9,600 bps

8 to 16 MHz

4,800 bps

4 to 16 MHz

2,400 bps

2 to 16 MHz