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ER-A410/ER-A420
HARDWARE DESCRIPTION
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CHAPTER 4. HARDWARE DESCRIPTION
1. BLOCK DIAGRAM
ER-23X
2. MEMORY MAP
2-1. ADDRESS MAP
Only the /CS0, /CS1 area (28000h~FFFFFh) in the bank is valid.
2-2. EXTERNAL BUS
*
CGROM is available only for the Japanese market.
CPU
MITSUBISHI M30620SAFP 12MHz
(INTERNAL RAM 10KB)
(INTERNAL RAM 10KB)
EXTERNAL MEMORY
RAM
512KB
FLASH ROM
512KB
SHARP LH28F004BVT
CGROM
1MB (JAPAN ONLY)
PRINTER
PR45M
II
POWER
SUPPLY
CPU
RAM 10KB
DRAWER 1
DRAWER 2
RAM CGROM
512KB 1MB
DRIVER, SENSOR
DRIVER, SENSOR
PRINTER
EFT I/F BOARD
(option)
MUX
RS232C CH1
RS232C CH2
KEY & SW
KEY SCAN
KEY RETURN
4 to 16
DECODER
SEG DRIVER
DIG DRIVER
LCD
16 DIGITS
x 2 LINES
POPUP
7-DIGIT
7-DIGIT
LED
EXTERNAL BUS ACCSESS SPEED
SRAM/EPROM/FLASH ROM; 2 BCLK
CGROM; 3 BCLK
EXTERNAL I/O; 2 BCLK
*
1BCLK = 83.3ns (at 12MHz)
SRAM
/CS2 area
address 08000h~27FFFh 128KB
/CS1 area BANK 0,2
address 28000h~2FFFFh 32KB x 2
/CS0 area BANK 0
address 30000h~7FFFFh 320KB
FLASH ROM
/CS0 area BANK 0
address 80000h~FFFFFh 258KB
(Moves to Bank 1 when rewriting using EPROM.)
CGROM
/CS0 area BANK 2,3
address 40000h~BFFFFh (512KB x 2)
I/O
/CS3 area BANK0
address 04000h~07FFFh 16KB
Internal RAM area
10KB
External SRAM
4
64KB
External SRAM
5
256KB
CG ROM
512KB
(Lower level)
FLASH ROM
Lower 256KB
FLASH ROM
Lower 256KB
IPL SW
OFF: Flash ROM
ON: EP RPM
OFF: Flash ROM
ON: EP RPM
IPL SW
OFF: EP ROM
ON: Flash RPM
OFF: EP ROM
ON: Flash RPM
CG ROM
512KB
(Upper level)
External SRAM
2
32KB
External SRAM
3
32KB
External SRAM
1
128KB
Internal reserved area
External I/O
Even if the bank is changed, the same
address can be accessed.
address can be accessed.
00400h
00000h
BR1
BR0
/CS0
0
0
0
BANK 0
0
1
0
BANK 1
1
0
0
BANK 2
1
1
0
BANK 3
02C00h
04000h
08000h
28000h
30000h
40000h
50000h
80000h
C0000h
FFFFFh
/CS3
/CS2
/CS1
/CS0
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