Table of Contents
Advertisement
Table 19.5 Boot Mode Operation
Host Operation
Processing Contents
Continuously transmits data H'00
at specified bit rate.
Transmits data H'55 when data H'00
is received error-free.
H'AA reception.
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).
H'AA reception.
Rev. 2.00, 05/03, page 660 of 820
Communication Contents
H'00, H'00 . . . H'00
Upper bytes, lower bytes
Boot program
erase error
Branches to boot program at reset-start.
• Measures low-level period of receive data H'00.
• Calculates bit rate and sets BRR in SCI_1.
• Transmits data H'00 to host as adjustment end
H'00
indication.
H'55
H'AA
Transmits data H'AA to host when data H'55 is
received.
Echobacks the 2-byte data
Echoback
received to host.
Echobacks received data to host and also
H'XX
transfers it to RAM.
Echoback
(repeated for N times)
H'FF
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'AA
H'FF to host and aborts operation.)
Branches to programming control program
transferred to on-chip RAM and starts
execution.
LSI Operation
Processing Contents
Boot program initiation
Advertisement
Table of Contents
