h8s-2138 Renesas Electronics Corporation., h8s-2138 Datasheet - Page 694
h8s-2138
Manufacturer Part Number
h8s-2138
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2138.pdf
(1061 pages)
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Section 22 ROM
22.6.1
When boot mode is used, the flash memory programming control program must be prepared in the
host beforehand. The channel 1 SCI to be used is set to asynchronous mode.
When a reset-start is executed after the chip’s pins have been set to boot mode, the boot program
built into the chip is started and the programming control program prepared in the host is serially
transmitted to the chip via the SCI. In the chip, 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 22.7, and the boot program mode
execution procedure in figure 22.8.
Rev. 4.00 Jun 06, 2006 page 640 of 1004
REJ09B0301-0400
Boot Mode
Host
(H8S/2138 F-ZTAT A-Mask Version, H8S/2134 F-ZTAT A-Mask Version)
Figure 22.7 System Configuration in Boot Mode
Verify data transmission
Write data reception
RxD1
TxD1
SCI1
The chip
Flash memory
On-chip RAM
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