Peripheral Circuits And Operation; Memory Map; Chapter 4 P Eripheral C Ircuits And O Peration - Epson S1C63656 Technical Manual

4 P
CHAPTER
The peripheral circuits of S1C63656 (timer, I/O, etc.) are interfaced with the CPU in the memory
mapped I/O method. Thus, all the peripheral circuits can be controlled by accessing the I/O memory on
the memory map using the memory operation instructions. The following sections explain the detailed
operation of each peripheral circuit.

4.1 Memory Map

The S1C63656 data memory consists of 1,024-word RAM, 1,024-word data ROM, 48-word display
memory and 101-word peripheral I/O memory. Figure 4.1.1 shows the overall memory map of the
S1C63656, and Table 4.1.1 the peripheral circuits' (I/O space) memory maps.
0000H
0400H
8000H
8400H
F000H
FF00H
FFFFH
Note: Memory is not implemented in unused areas within the memory map. Further, some non-imple-
mentation areas and unused (access prohibition) areas exist in the peripheral I/O area. If the
program that accesses these areas is generated, its operation cannot be guaranteed. Refer to the
I/O memory maps shown in Table 4.1.1 for the peripheral I/O area.
S1C63656 TECHNICAL MANUAL
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Memory Map)
ERIPHERAL
RAM area
Unused area
Data ROM area
Unused area
I/O memory area
Fig. 4.1.1 Memory map
EPSON
C
IRCUITS AND
F000H
Display memory area
F030H
Unused area
FF00H
Peripheral I/O area
FFFFH
O
PERATION
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