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| HD64F2357VF13 Datasheet, PDF (595/1049 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents | |||
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19.3 Operation
The on-chip ROM is connected to the CPU by a 16-bit data bus, and both byte and word data can be accessed in one state.
Even addresses are connected to the upper 8 bits, and odd addresses to the lower 8 bits. Word data must start at an even
address.
The on-chip ROM is enabled and disabled by setting the mode pins (MD2, MD1, and MD0) and bit EAE in BCRL. These
settings are shown in tables 19-2 and 19-3.
Table 19-2 Operating Modes and ROM Area (H8S/2357 F-ZTAT)
Mode Pin
Operating Mode
Mode 0 â
FWE MD2 MD1 MD0
0000
Mode 1
1
Mode 2
10
Mode 3
1
Mode 4 Advanced expanded mode
with on-chip ROM disabled
100
Mode 5 Advanced expanded mode
1
with on-chip ROM disabled
Mode 6 Advanced expanded mode
with on-chip ROM enabled
10
Mode 7 Advanced single-chip mode
1
Mode 8 â
1000
Mode 9
1
Mode 10 Boot mode (advanced
expanded mode with on-
chip ROM enabled)*3
10
BCRL
EAE On-Chip ROM
ââ
â Disabled
0
Enabled (128 kbytes)*1
1
Enabled (64 kbytes)
0
Enabled (128 kbytes)*1
1
Enabled (64 kbytes)
ââ
0
Enabled (128 kbytes)*2
1
Enabled (64 kbytes)
Mode 11 Boot mode (advanced
single-chip mode)*4
Mode 12 â
Mode 13
Mode 14
User program mode
(advanced expanded mode
with on-chip ROM
enabled)*3
1
100
1
10
0
Enabled (128 kbytes)*2
1
Enabled (64 kbytes)
ââ
0
Enabled (128 kbytes)*1
1
Enabled (64 kbytes)
Mode 15 User program mode
(advanced single-chip
mode)*4
1
0
Enabled (128 kbytes)*1
1
Enabled (64 kbytes)
Notes: 1. Note that in modes 6, 7, 14, and 15, the on-chip ROM that can be used after a power-on reset is the 64-kbyte
area from H'000000 to H'00FFFF.
2. Note that in the mode 10 and mode 11 boot modes, the on-chip ROM that can be used immediately after all
flash memory is erased by the boot program is the 64-kbyte area from H'000000 to H'00FFFF.
3. Apart from the fact that flash memory can be erased and programmed, operation is the same as in advanced
expanded mode with on-chip ROM enabled.
4. Apart from the fact that flash memory can be erased and programmed, operation is the same as in advanced
single-chip mode.
Rev.6.00 Oct.28.2004 page 565 of 1016
REJ09B0138-0600H
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