Sharp XE-A40S

XE-A40S
4 – 1
XE-A40S
Service Manual
CHAPTER 4. HARDWARE DESCRIPTION
[1] BLOCK DIAGRAM [2] MEMORY MAP
1. ADDRESS MAP
Only the BANK in /CS area(30000h-FFFFFh) is effective.
2. EXTERNAL BUS
[3] PRINTER CONTROL
1. STEPPING MOTOR CONTROL
The stepping motor is driven at a constant voltage by Sanken
STA471A.
1step: 0.125mm, A1dot: 1step
Printing speed 50mm/s
1.1. CPU’s PORT
CPU
M30620SAFP (MITSUBISHI, internal RAM 10KB)
External memory
RAM 256KB
FLASH ROM 512KB
SHARP LH28F004BVT
PRINTER PR45M II
USB controller RENESAS M66291GP
256KB
SRAM
512KB
FLASH ROM
PRINTER
CPU
RAM 10KB
4to16
D
ECODER
USB
M66291GP
KEY & SW
POWER
SUPPLY
DRAWER
DIG DRIVER
SEG DRIVER
KEY RETURN
KEY SCAN
POPUP
7 digits
LCD
16 digits x 2
DRIVER, SENSOR
External BUS Access Speed
*1BCLK=83.3ns (at 12MHz)
SRAM: 2BCLK
EPROM: 2BCLK
FLASH ROM: 2BCLK
External I/O: 2BCLK
SRAM /CS2 Area address 08000h~27FFFh 128KB
/CS0 Area BANK0 address 30000h~4FFFFh 128KB
FLASH
ROM
/CS0 Area BANK0 address 80000h~FFFFFh 512KB
*Moves to Bank 1 when rewritten using EPROM
No. CPU PORT Signal to be used
80 P10 RAS
79 P11 RBS
78 P12 RCS
77 P13 RDS
76 P14 JAS
75 P15 JBS
74 P16 JCS
73 P17 JDS
BANK 0 BANK 1
/CS0 0 0
BA0 0 1
00000h
00400h
02C00h
04000h
/CS3
08000h
/CS2
28000h
/CS1
30000h
External SRAM 2
External reserved area
40000h
128KB
50000h /CS0
80000h
IPL MODE
IPL MODE
OFF: Flash ROM OFF: EP ROM
ON: EP ROM ON: Flash RPM
C0000h
FFFFFh
Internal rserved area
External I/O
External SRAM 1
External I/O
(USB controller)
Internal RAM area
10KB
128KB