HD6412373R RENESAS [Renesas Technology Corp], HD6412373R Datasheet - Page 916

• Manufacturer Part Number: HD6412373R
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2300 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 20 Flash Memory (0.35-μm F-ZTAT Version)
Table 20.5 Boot Mode Operation
Rev.7.00 Mar. 18, 2009 page 848 of 1136
REJ09B0109-0700
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
H'AA reception.
is received error-free.
at specified bit rate.
Processing Contents
H'AA reception
Host Operation
Boot program
erase error
Upper bytes, lower bytes
Communication Contents
H'00, H'00 . . . H'00
Echoback
Echoback
H'XX
H'00
H'55
H'AA
H'AA
H'FF
Echobacks the 2-byte data
received to host.
Echobacks received data to host and also
transfers it to RAM.
(repeated for N times)
• 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
Transmits data H'AA to host when data H'55 is
received.
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 boot program at reset-start.
Branches to programming control program
transferred to on-chip RAM and starts
execution.
indication.
Boot program initiation
Processing Contents
LSI Operation