Read Sharp XE-A303 (serv.man4) Service Manual online
XE-A303 (V)
HARDWARE DESCRIPTION
– 5 –
CHAPTER 4. HARDWARE DESCRIPTION
1. BLOCK DIAGRAM
< Main parts >
CPU
: M30623MEP-A93GP (Renesus)
ROM 192KByte (MASK) RAM 16KByte
External RAM : 4Mbit (512K
u
8) CYPRESS CY62148BELL-45ZSXI
External ROM : 4Mbit (512K
u
8) SPANSION MBM29F400TC-70
Printer
: M-T203/M-T205 (EPSON)
USB controller : M66291GP (Renesus)
Display Front
: LCD 2 line (16 digits) /2 color backlight
POPUP
: 7 digit LED
2. MEMORY MAP
Normal operation: Microprocessor mode (1MByte mode, PM13 = 0)
< External BUS >
External BUS ACCSESS SPEED
CS0/CS2 area : SRAM
; 3 BCLK
: FROM
; 3 BCLK
CS1 area
: USB controller ; 3 BCLK
CS3 area
: DISPLAY
; 2 BCLK
*
1BCLK=62.5ns (at 16MHz)
< External RAM >
The physical address 0800h~26FFFh of the external RAM can be
accessed either from CS2 area 08000h~26FFFh or from RAMBANK=0
of CS0 area 48000h~66FFFh.
of CS0 area 48000h~66FFFh.
The physical address 00000h of the RAM is not used.
CPU
M16C/62P
M30623MEP-A93GP
ROM 192KByte
RAM 16KByte
M30623MEP-A93GP
ROM 192KByte
RAM 16KByte
S-RAM
512KByte
512KByte
USB
Controller
M66291GP
Controller
M66291GP
LCD
2 line
2 line
Latch
Latch
SEG
Driver
Driver
DIG
Driver
Driver
LED
PopUp 7
PopUp 7
Decoder
74HC138
74HC138
u
2
4 to 16
KEY
SWITCH
SWITCH
KEY
RETURN
RETURN
PRINTER
M-T203
M-T205
(24V)
M-T203
M-T205
(24V)
F-ROM
512KByte
512KByte
USB
Type B
Type B
Driver/Sensor
DRAWER
KEY SCAN
POWER
5.8V LED POPUP
5.0V
3.3V
24V
5.0V
3.3V
24V
Ni-MH
Battery
Battery
00000h SFR
00400h Internal RAM 12KByte
(00400h-033FFh)
033FFh
03400h
03400h
04000h POPUP Display 04000h /CS3 16K
Front Display 04001h
08000h External RAM
External RAM
External ROM
/CS2 124K
124KByte/512KByte
27000h
28000h USB
/CS1 32K
Controller
30000h
/CS0 832K
RAM Physical adress
are in parentheses.
are in parentheses.
40000h 40000h
(00000h)
(40000h)
512KByte
(07FFFh)
(256KByte
u
2 Bank)
48000h
/CS2 area
Shadow
Shadow
50000h
80000h
512KByte
60000h
66FFFh (26FFFh)
67000h
66FFFh (26FFFh)
67000h
(27000h)
C0000h
70000h
D0000h
FFFFFh 7FFFFh (3FFFFh) (7FFFFh)
80000h RAM
BANK=0
RAM
BANK=1
BANK=1
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