Specifications

II-4 EPSON S1C62N82 TECHNICAL SOFTWARE
CHAPTER 1: CONFIGURATION
Data Memory Map
The S1C62N82 built-in RAM has 144 words of data memory,
80 words of display memory for the LCD, and I/O memory
for controlling the peripheral circuit. When writing pro-
grams, note the following:
(1)Since the stack area is in the data memory area, take
care not to overwrite the stack with data. Subroutine
calls or interrupts use 3 words on the stack.
(2)Data memory addresses 000H–00FH are memory register
areas that are addressed with register pointer RP.
1.4
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–08FH)
144 words x 4 bits (R/W)
I/O memory area Table 1.4.1 (a)–(g)
Display memory area (090H–0DFH)
80 words x 4 bits (R/W)
Unused area
*
Fig. 1.4.1
Data memory map
* If the duty of the LCD driver is set to 1/8 by the mask
option in the display memory area (80 words × 4 bits), 304
bits (38 segments × 8 common bits) are used. If the duty is
set to 1/4, 168 bits (42 segments × 4 common bits) are
used. The bits unassigned as display memory can serve
as a general-purpose RAM.
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.
Note