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UX-A52
UPD780024AGKB21 (IC251) : Unit micon
1. Pin layout
64
~
49
1
~
16
17
~
32
2. Pin function (1/2)
Pin
Symbol
No.
P50/A8
1
P59/A9
2
MCS
3
MRDY
4
CDINDEX
5
CDEMP
6
CDTNO
7
CDCOPY
8
VSS0
9
VDD0
10
P30
11
P31
12
P32
13
MUTE
14
SUBQ
15
P35/SO31
16
SQCK
17
KCMND
18
MSTAT
19
MCLK
20
RXDO
21
TXDO
22
P25/SCK0
23
VDD1
24
AVSS
25
KEY1
26
KEY2
27
PCHK
28
P14/AN14
29
P13/AN13
30
/OPEN
31
/REST
32
1-34
48
~
33
I/O
Connected to GND
-
Not used
-
Pull-up +B
-
Not used
-
Not used
-
CD emphasis detection
I
CD track No. detection
I
CD copy detection
I
GND
-
Power supply
-
Not used
-
Not used
-
Not used
-
Mute output
O
Sub-code Q data input from IC651
I
Not used
-
Sub-code Q register clock output to IC651
O
Kick command data
O
CD control status output to IC801
O
CD control command clock input from IC801
I
Digital data input
I
Digital data output
O
Connected to GND
-
Power supply
-
GND
-
Key input 1
I
Key input 2
I
Parity check
I
-
Connected to GND
-
Connected to GND
I
Open switch input
I
Rest switch input
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