h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 714
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h8s-2646
Manufacturer Part Number
h8s-2646
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2646.pdf
(1165 pages)
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Section 20 ROM
20.6.1
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 LSI’s pins have been set to boot mode, the boot program
built into the LSI is started and the programming control program prepared in the host is serially
transmitted to the LSI via the SCI. In the LSI, 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 20.6, and the boot mode execution
procedure in figure 20.7.
Rev. 5.00 Sep 22, 2005 page 688 of 1136
REJ09B0257-0500
Boot Mode
Host
Figure 20.6 System Configuration in Boot Mode
Verify data transmission
Write data reception
RxD1
TxD1
SCI1
LSI
Flash memory
On-chip RAM
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