Figure 19.6 System Configuration When Using Boot Mode - Hitachi H8/3062 Hardware Manual

19.5.1 Boot Mode
When boot mode is used, a flash memory programming control program must be prepared
beforehand in the host, and SCI channel 1, which is to be used, must be set to asynchronous mode.
When a reset-start is executed after setting the H8/3062F-ZTAT B-mask version' pins to boot
mode, the boot program already incorporated in the MCU is activated, and the programming
control program prepared beforehand in the host is transmitted sequentially to the H8/3062F-
ZTAT B-mask version, using the SCI. In the H8/3062F-ZTAT B-mask version, the programming
control program received via the SCI is written into the programming control program area in on-
chip RAM. After the transfer is completed, an identification check (ID code check) is carried out
to see if the programming control program is compatible with the H8/3062F-ZTAT B-mask
version. If the ID code matches, control branches to the start address (H'FFF520) of the
programming control program area and the programming control program execution state is
entered (flash memory programming/erasing can be performed).
Figure 19.6 shows a system configuration diagram when using boot mode, and figure 19.7 shows
the boot program mode execution procedure.
Host

Figure 19.6 System Configuration When Using Boot Mode

594
Reception of programming data
Transmission of verify data
H8/3062F-ZTAT B-mask version
Flash memory
RxD1
SCI1
On-chip RAM
TxD1