HD643303x Hitachi, HD643303x Datasheet - Page 75
HD643303x
Manufacturer Part Number
HD643303x
Description
Hitachi Microcomputer
Manufacturer
Hitachi
Datasheet
1.HD643303X.pdf
(572 pages)
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3.4 Operating Mode Descriptions
3.4.1 Mode 1
1-Mbyte address space can be accessed including the on-chip ROM addresses. Port 3 pins
function as data pins D
to D
and port 1, 2, and 5 pins function as address pins A
to A
. The
7
0
19
0
address bus width can be selected by setting DDR of ports 1, 2, and 5.
3.4.2 Mode 2
This mode is a normal mode with a 64-kbyte address space which operates using the on-chip
ROM, RAM, and registers. External addresses cannot be accessed. The vector area and stack area
can be saved.
3.4.3 Mode 3
This mode is an advanced mode with a 1-Mbyte address space which operates using the on-chip
ROM, RAM, and registers. External addresses cannot be accessed.
60
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