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ER-A520U/ER-A530U HARDWARE DESCRIPTION
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CHAPTER 4. HARDWARE DESCRIPTION
1. BLOCK DIAGRAM
ER-A520 and ER-A530
2. MEMORY MAP
2-1. ADDRESS MAP
CPU
MITSUBISHI M30802GP 12MHz
(INTERNAL RAM 10KB)
EXTERNAL MEMORY
STD RAM 1MB
OPT RAM 2MB
FLASH ROM 1MB
PRINTER
PR58HM
2MB 1MB1MB
PRINTER
CPU
RAM 10KB
4 to 16
DECODER
RS232C CH1
DRIVER, SENSOR
KEY & SW
㪧㪦㪮㪜㪩㩷㪪㪦㪬㪚㪜
DRAWER2
DRAWER2
KEY SCAN
KEY SCAN
DIG DRIVER
DIG DRIVER
SEG DRIVER
SEG DRIVER
KEY RETURN
KEY RETURN
RAM OPT RAM FROM
PO
PO
PUP
PUP
LED
LCD
LCD
16 digits
7 digits
x 2LINE
RS232C CH2
DRAWER1
DRAWER1
CI
5V
500000h
600000h
700000h
800000h
900000h
A00000h
B00000h
C00000h
D00000h
E00000h
F00000h
FFFFFFh
F-ROM(1MB) EPROM(1MB)
EPROM(1MB) F-ROM(1MB)
NOT USED
NOT USED
NOT USED
INTERNAL
AREA
(1BCLK:0WAIT)
Microprocessor mode : MODE0
IPLION0# "L" IPLON0# "H"
EXTERNAL
AREA0
(2BCLK:1WAIT)
EXTERNAL
AREA1
(3BCLK:2WAIT)
EXTERNAL
AREA2
(3BCLK:2WAIT)
EXTERNAL
AREA3
(2BCLK:1WAIT)
SFR AREA
EXTERNAL I/O
INTERNAL RAM AREA(10KB)
INTERNAL RESERVE AREA
NOT USED
NOT USED
EXPANSION SRAM(UP-S02MB)
400000h - 5FFFFFh
400000h - 5FFFFFh
EXPANSION SRAM
(UP-S04MB)
000000h
000400h
000800h
100000h
200000h
300000h
400000h
STD SRAM(1MB)