HD6432670 Hitachi, HD6432670 Datasheet - Page 802

• Manufacturer Part Number: HD6432670
• Description: (HD64F267x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

19.6
In an on-board programming mode, programming, erasing, and verification for the on-chip flash
memory can be performed. There are two on-board programming modes: boot mode and user
program mode. Table 19.4 shows how to select boot mode. User program mode can be selected by
setting the control bits by software. For a diagram that shows mode transitions of flash memory,
see figure 19.2.
Table 19.4 Setting On-Board Programming Modes
Boot mode
User program mode
Notes: 1. The initial setting for the external bus width is 16 bits.
Boot mode
19.6.1
When this LSI enters boot mode, the embedded boot program is started. The boot program
transfers the programming control program from the externally connected host to the on-chip
RAM via the SCI_1. When the flash memory is all erased, the programming control program is
executed.
Table 19.5 shows the boot mode operations between reset end and branching to the programming
control program.
Rev. 2.0, 04/02, page 756 of 906
H8S/2678 Series
H8S/2678R Series
2. The initial setting for the external bus width is 8 bits
On-Board Programming Modes
Boot Mode
Mode Setting
Mode Setting
Expanded mode with on-chip
ROM enabled
Single-chip activation expanded
mode with on-chip ROM enabled
Expanded mode with on-chip
ROM enabled
External ROM activation expanded
mode with on-chip ROM enabled*
External ROM activation expanded
mode with on-chip ROM enabled*
Single-chip activation expanded
mode with on-chip ROM enabled
Single-chip activation expanded
mode with on-chip ROM enabled
1
2
FWE
1
1
1
1
1
1
MD2
0
MD2
0
0
1
1
1
1
MD1
1
MD1
1
1
0
0
1
1
MD0
1
MD0
0
1
0
1
0
1