HD6412240 RENESAS [Renesas Technology Corp], HD6412240 Datasheet - Page 574
HD6412240
Manufacturer Part Number
HD6412240
Description
Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6412240.pdf
(818 pages)
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Section 16 ROM
16.3
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 (MD
EAE in BCRL. These settings are shown in table 16.2.
In the H8S/2246, H8S/2245, H8S/2244, and H8S/2243 normal mode, a maximum of 56 kbytes of
ROM can be used.
Table 16.2 Operating Modes and ROM Area
Operating Mode
Mode 1 Normal expanded
Mode 2 Normal expanded
Mode 3 Normal single-chip
Mode 4 Advanced expanded
Mode 5 Advanced expanded
Mode 6
Mode 7 Advanced single-chip
In H8S/2246 and H8S/2245 modes 6 and 7, the on-chip ROM available after a power-on reset is
the 64-kbyte area comprising addresses H'000000 to H'00FFFF.
Rev.3.00 Mar. 26, 2007 Page 532 of 772
REJ09B0355-0300
mode with on-chip
ROM disabled
mode with on-chip
ROM enabled
mode
mode with on-chip
ROM disabled
mode with on-chip
ROM disabled
Advanced expanded
mode with on-chip
ROM enabled
mode
Operation
MD
0
1
Mode Pin Setting
2
MD
0
1
0
1
1
MD
1
0
1
0
1
0
1
0
BCRL
EAE
—
—
—
0
1
0
1
H8S/2246 and
H8S/2245
Disabled
Enabled
(56 kbytes)
Disabled
Enabled
(128 kbytes)
Enabled
(64 kbytes)
Enabled
(128 kbytes)
Enabled
(64 kbytes)
H8S/2244 and
H8S/2243
Disabled
Enabled
(56 kbytes)
Disabled
Enabled
(64 kbytes)
On-Chip ROM
2
, MD
1
, and MD
H8S/2242 and
H8S/2241
Disabled
Enabled
(32 kbytes)
Disabled
Enabled
(32 kbytes)
0
) and bit
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