h8s-2635 Renesas Electronics Corporation., h8s-2635 Datasheet - Page 880
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h8s-2635
Manufacturer Part Number
h8s-2635
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2635.pdf
(1547 pages)
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Section 21B ROM (H8S/2638 Group, H8S/2639 Group, H8S/2630 Group)
21B.8.1 Boot Mode
When boot mode is used, the flash memory programming control program must be prepared in the
host beforehand. The SCI channel to be used is set to asynchronous mode.
When a reset-start is executed after the H8S/2638’, H8S/2639’, and H8S/2630’ pins have been set
to boot mode, the boot program built into the H8S/2638, H8S/2639, and H8S/2630 are started and
the programming control program prepared in the host is serially transmitted to the H8S/2638,
H8S/2639, and H8S/2630 via the SCI. In the H8S/2638, H8S/2639, and H8S/2630, 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, control branches to the start
address of the programming control program area and the programming control program execution
state is entered (flash memory programming is performed).
The transferred programming control program must therefore include coding that follows the
programming algorithm given later.
The system configuration in boot mode is shown in figure 21B-7, and the boot mode execution
procedure in figure 21B-8.
Figure 21B-7 System Configuration in Boot Mode
Rev. 6.00 Feb 22, 2005 page 820 of 1484
REJ09B0103-0600
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