Specifications

S1C6S2N7 TECHNICAL HARDWARE EPSON I-13
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Memory Map)
PERIPHERAL CIRCUITS
AND OPERATION
Peripheral circuits (timer, I/O, and so on) of the S1C6S2N7
Series are memory mapped. Thus, all the peripheral circuits
can be controlled by using memory operations to access the
I/O memory. The following sections describe how the pe-
ripheral circuits operate.
CHAPTER 4
Memory Map
The data memory of the S1C6S2N7 Series has an address
space of 129 words, of which 32 words are allocated to
display memory and 17 words, to I/O memory. Figure 4.1.1
shows the overall memory map for the S1C6S2N7 Series,
and Tables 4.1.1(a)–(e), the memory maps for the peripheral
circuits (I/O space).
4.1
Unused area
Fig. 4.1.1
Memory map
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.
Address
Page High
Low
0123456789ABCDE
F
M0 M1 M2 M3 M4 M5 M6 M7 M8 M9 MA MB MC MD ME MF
3
0
1
2
4
5
6
7
8
9
A
B
C
D
E
F
0
RAM area (000H–04FH)
80 words x 4 bits (R/W)
Display memory area (090H–0AFH)
32 words x 4 bits (Write only)
I/O memory area Tables 4.1.1(a)–(e)