h8s-2161b Renesas Electronics Corporation., h8s-2161b Datasheet - Page 674

• Manufacturer Part Number: h8s-2161b
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Section 23 ROM
Table 23.5 Boot Mode Operation
Rev. 3.00 Mar 21, 2006 page 620 of 788
REJ09B0300-0300
Transmits data H'55 when data H'00
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 of programming control
program (repeated for N times).
Continuously transmits data H'00
Receives data H'AA.
Receives data H'AA.
is received error-free.
at specified bit rate.
Processing Contents
Host Operation
Boot program
erase error
Communications Contents
H'00, H'00 . . . H'00
High-order byte and
low-order byte
Echoback
Echoback
H'FF
H'AA
H'AA
H'00
H'55
H'XX
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.)
Branches to programming control program
transferred to on-chip RAM and starts
execution.
• Measures low-level period of receive data H'00.
• Calculates bit rate and sets it in BRR of SCI_1.
• Transmits data H'00 to host as adjustment end
Echobacks received data to host and also
transfers it to RAM (repeated for N times).
Branches to boot program at reset-start.
After receiving data H'55, transmits data
H'AA to host.
Echobacks the 2-byte data received to host.
indication.
Boot program start
Processing Contents
LSI Operation