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參數資料
| 型號： | S1C62920D |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4-BIT, MROM, 1.3 MHz, MICROCONTROLLER, UUC63 |
| 封裝： | DIE-63 |
| 文件頁數： | 9/78頁 |
| 文件大小： | 874K |
| 代理商： | S1C62920D |
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S1C62920 TECHNICAL MANUAL
EPSON
9
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Memory Map)
CHAPTER
4 PERIPHERAL CIRCUITS AND OPERATION
Peripheral circuits (timer, I/O, and so on) of the S1C62920 are memory mapped, and interfaced with the
CPU. Thus, all the peripheral circuits can be controlled by using the memory operation command to access
the I/O memory in the memory map.
The following sections describe how the peripheral circuits operation.
4.1 Memory Map
Data memory of the S1C62920 has an address space of 192 words, of which 32 words are allocated to
display memory and 32 words to I/O memory.
Figure 4.1.1 presents the overall memory maps of the S1C62920, and Tables 4.1.1(a)–(c) the peripheral
circuits' (I/O space) memory maps.
In the S1C62920 the same I/O memory has been laid out for each page 80H–FCH. As a result, the I/O
memory can be accessed without changing over the data memory page. The same result is obtained for I/O
memory changes and for readable/writable address references, no matter on what page it is done.
Note: Memory is not mounted in unused area within the memory map and in memory area not indicated in
this chapter. For this reason, normal operation cannot be assured for programs that have been
prepared with access to these areas.
Fig. 4.1.1 Memory map
I/O memory
33 words
× 4 bits (*)
F
E
D
C
B
A
9
8
7
6
5
4
3
2
1
0
HIGH
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
PAGE
LOW
ADDRESS
0
RAM 128 words
× 4 bits (R/W)
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
1
Display memory 32 words
× 4 bits (W)
I/O memory
33 words
× 4 bits (*)
MF
ME
MD
MC
MB
MA
M9
M8
M7
M6
M5
M4
M3
M2
M1
M0
Unused area
Page switching
is unnecessary
in I/O memory
area
(*)
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