h8s-2635 Renesas Electronics Corporation., h8s-2635 Datasheet - Page 946
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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 21C ROM (H8S/2635 Group)
21C.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/2635 Group’s pins have been set to boot mode, the
boot program built into the H8S/2635 Group are started and the programming control program
prepared in the host is serially transmitted to the H8S/2635 Group via the SCI. In the H8S/2635
Group, 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 21C-7, and the boot mode execution
procedure in figure 21C-8.
Rev. 6.00 Feb 22, 2005 page 886 of 1484
REJ09B0103-0600
Host
Figure 21C-7 System Configuration in Boot Mode
Verify data transmission
Write data reception
RxD1
TxD1
SCI1
LSI
Flash memory
On-chip RAM
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