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UPD780024AGKB21(IC251) : Unit microcomputer
1.Pin layout
48
33
32
49
17
64
1
16
2.Pin function
Pin No.
Symbol
1
P50/A8
2
P59/A9
3
MCS
4
MRDY
5
CDINDEX
6
CDEMP
7
CDTNO
8
CDCOPY
9
VSS0
10
VDD0
11
P30
12
P31
13
P32
14
MUTE
15
SUBQ
16
P35/SO31
17
SQCK
18
KCMND
19
MSTAT
20
MCLK
21
RXDO
22
TXDO
23
P25/SCK0
24
VDD1
25
AVSS
26
KEY1
27
KEY2
28
PCHK
29
P14/AN14
30
P13/AN13
31
/OPEN
32
/REST
33
P10/AN10
34
AVREF
35
AVDD
36
/RESET
I/O
-
Connect to ground
-
Non connect
-
Pull-up +B
-
Non connect
-
Non connect
I
Detection of CD emphasis
I
Detection of CD track number
I
Detection of CD copy
-
Connect to ground
-
Power supply terminal
-
Non connect
-
Non connect
-
Non connect
O
Muting output
I
Sub-code Q data input from IC651
-
Non connect
O
Clock output for sub-code Q resistor to IC651
O
Kick command data output
O
CD control to IC801 (status output)
I
CD control from IC801 (command clock input)
I
Digital data input
O
Digital data output
-
Connect to ground
-
Power supply terminal
-
Connect to ground
I
Key input 1
I
Key input 2
I
parity check
-
Connect to ground
-
Connect to ground
I
OPEN switch input
I
REST switch input
-
Connect to ground
-
Standard voltage for analog circuit
(connect to power supply terminal for analog circuit)
-
Power supply terminal for analog circuit
I
CD control from IC801 (reset input)
UPD780024AGKB21 1/2
Description
XL-R2010BK
1-27
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