Sharp XL-520H Service Manual page 37

IC701 RH-iX0189AWZZ:System Microcomputer(iX0189AW) (2/2)
Terminal Name Input/Output
Pin No.
53 REC
54 B-CAN
55 BIAS
56 LID-SW
57 PU-IN
58 CD STB
59-62 BUS 0-3
63*,64* SRS2,1
65*-68*
69-100* SEG31-0
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
COM3 O 1
COM2 O 2
COM1 O 3
COM0 O 4
VLC3 5
VLC2 6
VLC1 7
VDD 8
OSC2 O 9
OSC1
I 10
VSS 11
XI I 12
XO O 13
MMOD I 14
VREF- 15
AREA I 16
KEY1 I 17
KEY2 I 18
POWER I 19
VSM I 20
F.P I 21
RUN PLS I 22
CAM-SW I 23
VREF+ 24
DI O 25
Output Tape circuit record/playback selection output
Output Record bias oscillation frequency selection control output
Output Record bias oscillation circuit control output
Input CD lid status detection input
Input CD pickup position detection SW input
In/Output CD servo control IC ON/OFF output terminal
In/Output TC9284F control data input/output terminal
Output SRS control output
— No connect
— LCD SEGMENT output
Note: Since RH-IX0189AWZZ is a 24-pin LCD, SEG0 of LCD is connected to SEG7 of
microcomputer output terminal (sequential connection up to SEG26).
RH-IX0189AWZZ
Figure 37 BLOCK DIAGRAM OF IC
Function
H:Record Mode
H: Bias oscillation
L: Lid closed
L: Innermost periphery
L: Servo On
– 37 –
XL-520H,520E/CP-520,520E
L:Playback Mode
L: Oscillation stop
H: Lid opened
H: Servo Stand-by
75 S SEG25
74 S SEG26
73 S SEG27
72 S SEG28
71 S SEG29
70 S SEG30
69 S SEG31
68 S
67 S
66
65
64 O SRS1
63 O SRS2
62 I/O BUS3
61 I/O BUS2
60 I/O BUS1
59 I/O BUS0
58 O CD_STB
57 I PU-IN
56 I LID-SW
55 O BIAS
54 O B-CAN
53 O REC
52 O MOT
51 O SOL