Sharp XE-A101 Service Manual page 8

4. CPU PORT TABLE
No. PIN Name
1 P50/A8 RWND
2 P51/A9 DR
3 P52/A10 SA2
4 P53/A11 SB2
5 P54/A12 SC2
6 P55/A13 SD2
7 P56/A14 SE2
8 P57/A15 SF2
9 Vss0 GND
10 Vdd0 VDD
11 P30 ST1-
12 P31 ST2-
13 P32 ST3-
14 P33 ST4-
15 P34/SI31 ST5
16 P35/SO31 NU
17 P36/SCK31- NU
18 P20/SI30 SA1
19 P21/SO30 SB1
20 P22/SCK30- SC1
21 P23/RXD0 SD1
22 P24/TXD0 SE1
23 P25/ASCK0 SF1
24 Vdd1 VDD
25 Avss GND
26 P17/ANI7 VBAT
27 P16/ANI6 NU
28 P15/ANI5 KR6
29 P14/ANI4 KR5
30 P13/ANI3 KR4
31 P12/ANI2 KR3
32 P11/ANI1 KR2
33 P10/ANI0 KR1
34 Avref VCC
35 Avdd VDD
36 RESET- RESET-
37 XT2 XT2
38 XT1 XT1
39 IC/VPP GND
40 X2 X2
41 X1 X1
42 Vss1 GND
43 P00/INTP0 /POF
44 P01/INTP1 T
45 P02/INTP2 t
46 P03/INTP3/ADTRG R
47 P70/TI00/TO0 SG1
48 P71/TI01 SDP1
49 P72/TI50/TO50 SG2
50 P73/TI51/TO51 SDP2
51 P74/PCL NU
52 P75/BUZ BUZ
53 P64/RD- MTR
54 P65/WR- TRG
55 P66/WAIT- MSL1
56 P67/ASTB MSL2
57 P40/AD0 KST1
58 P41/AD1 KST2
59 P42/AD2 KST3
60 P43/AD3 KST4
61 P44/AD4 KST5
62 P45/AD5 KST6
63 P46/AD6 KST7
64 P47/AD7 KST8
Signal Name
REWIND MOTOR
To DRAWER
DISPLAY SEGMENT
DISPLAY SEGMENT
DISPLAY SEGMENT
DISPLAY SEGMENT
DISPLAY SEGMENT
DISPLAY SEGMENT
DISPLAY STROBE N-Ch O.D.
DISPLAY STROBE N-Ch O.D.
DISPLAY STROBE N-Ch O.D.
DISPLAY STROBE N-Ch O.D.
DISPLAY STROBE (H ACTIVE)
(GND via 56k)
(GND via 56k)
DISPLAY SEGMENT
DISPLAY SEGMENT
DISPLAY SEGMENT
DISPLAY SEGMENT
DISPLAY SEGMENT
DISPLAY SEGMENT
BATTERY voltage
RESERVE FOR KEY RETURN
KEY RETURN
KEY RETURN
KEY RETURN
KEY RETURN
KEY RETURN
KEY RETURN
32.768Khz Xtal
32.768Khz Xtal
SYSTEM CLOCK
SYSTEM CLOCK
POWER OFF
From PRINTER
From PRINTER
From PRINTER
DISPLAY SEGMENT
DISPLAY SEGMENT
DISPLAY SEGMENT
DISPLAY SEGMENT
BUZZER
To PRINTER
To PRINTER
MODEL SELECT1
MODEL SELECT2
KEY STROBE
KEY STROBE
KEY STROBE
KEY STROBE
KEY STROBE
KEY STROBE
KEY STROBE
KEY STROBE
Description Output/Input Initial state When STBY
O L
O L
O L
O L
O L
O L
O L
O L
O H
O H
O H
O H
O L
I
I
O L
O L
O L
O L
O L
O L
I
I
I
I
I
I
I
I
I
I
I
I
O L
O L
O L
O L
O L
O L
O L
O L
I
I
O L
O L
O L
O L
O L
O L
O L
O L
O/L
O/L
O/L
O/L
O/L
O/L
O/L
O/L
I
I
I
I
O/L
I
I
O/L
O/L
O/L
O/L
O/L
O/L
I
I
I
I
I
I
I
I
I
I
I
I
O/L
O/L
O/L
O/L
O/L
O/L
O/L
O/L
I
I
O/L
O/L
O/L
O/L
O/L
O/L
O/L
O/L