Read Sharp DM-1505 (serv.man2) Service Manual online
Interface ASIC (VHIKZ3H008302) I/O pin arrangement list (PCL Model)
PIN
No.
Pin name
Signal name
IN/OUT
Destination
Function
1
V
DD
3.3V
IN
Power source
2
CPUD13
LDT13
IN/OUT
74LVC16245
Data bus
3
CPUD14
LDT14
IN/OUT
74LVC16245
Data bus
4
CPUD15
LDT15
IN/OUT
74LVC16245
Data bus
5
MODECLK
MODECLK
OUT
74LS244
Boot mode clock
6
MODEIN
MODEIN
OUT
CPU
CPU boot mode setup serial data
output
output
7
CPUINTR_1
PARINTR_
OUT
CPU
Print request interruption output
8
DAMMY
1284-EN_ , USB-
EN_ , USB-ON
EN_ , USB-ON
OUT
USS-725, 74LVX244, I/F_CN
IEEE1284/USB selection enable
signal
signal
9
EREADY_1
PREADY_
OUT
74LVC244
Print ready signal
10
SRDY_1
SRDY_
OUT
74LVC244
PCL side reception ready signal
11
GND
GND
IN
GND
12
GND
GND
IN
GND
13
AD2
RAD2
IN/OUT
74LVC16244, 8M Flash, 16M Flash
Address bus
14
AD3
RAD3
IN/OUT
74LVC16244, 8M Flash, 16M Flash
Address bus
15
AD4
RAD4
IN/OUT
74LVC16244, 8M Flash, 16M Flash
Address bus
16
AD5
RAD5
IN/OUT
74LVC16244, 8M Flash, 16M Flash
Address bus
17
READY_1
EREADY_
IN
74LS244
MCU side ready signal
18
CRDY_1
CRDY_
IN
74LS244
MCU side reception ready signal
19
PSON_1
IN
NC (3.3V pull up)
20
NETON_1
IN
NC (3.3V pull up)
21
EXON_1
USB-IN
IN
I/F_CN
USB input detection signal
22
SCK
SCK
IN
24C16
EEPROM serial clock
23
SDAOUT
SDAOUT
IN
24C16
EEPROM serial data output
24
SDAIN
SDAIN
IN
24C16
EEPROM serial data input
25
BSEL4
IN
Process speed setup JP (3.3V pull
up)
up)
26
BSEL3
IN
Process speed setup JP (GND pull
down)
down)
27
BSEL2
IN
Process speed setup JP (GND pull
down)
down)
28
BSEL1
IN
Process speed setup JP (GND pull
down)
down)
29
BSEL0
IN
Process speed setup JP (3.3V pull
up)
up)
30
SLCT
SLCT
OUT
74LCX244, USS-725
Printer selection state
31
FAULT_1
FAULT_
OUT
74LCX244, USS-725
Printer error
32
PE
PE
OUT
74LCX244, USS-725
Paper end
33
BUSY
BUSY
OUT
74LCX244, USS-725
Printer busy state
34
ACK_1
ACK_
OUT
74LCX244, USS-725
ACK status
35
STB_1
STB_
IN
74LCX244
STROBE control signal
36
AUTOFD_1
AUTOFD_
IN
74LCX244
Automatic new-line control signal
37
SLCTIN_1
SLCTIN_
IN
74LCX244
Printer selection
38
INIT_1
INIT_
IN
74LCX244
Printer initializing
39
PARAD7
PARAD7
IN
74LCX245, USS-725
Parallel I/F data bus
40
V
DD
3.3V
IN
Power source
41
V
DD
3.3V
IN
Power source
42
PARAD6
PARAD6
IN
74LCX245, USS-725
Parallel I/F data bus
DM-1505
11 – 26
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