E0C6006 TECHNICAL MANUAL
EPSON
9
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Memory Map)
CHAPTER
4
P
ERIPHERAL
C
IRCUITS
AND
O
PERATION
Peripheral circuits (timer, I/O, and so on) of the E0C6006 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 peripheral circuits operate.
4.1 Memory Map
The data memory of the E0C6006 has an address space of 175 words, of which 32 words are allocated to
display memory and 15 words, to I/O memory. Figure 4.1.1 show the overall memory map for the
E0C6006, and Table 4.1.1, the memory maps for the peripheral circuits (I/O space).
Address
Page
High
Low
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
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–07FH)
128 words
×
4 bits (R/W)
Display memory area (0D0H–0EFH)
32 words
×
4 bits (W only)
Unused area
I/O memory See Table 4.1.1
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.
