XL-R5020BK
34
5.17UPD780076GK-533(IC251):Unit microcomputer
• Pin layout
• Pin layout
UPD780076GK-533 1/2
Pin No.
Symbol
I/O
Description
1
E2SCK
O Serial clock output to IC201
2
E2SDL
I/O Serial data input/output with IC201
3
MCS
I
Communication method selection input from system microcomputer
L : Synchronization H : Asynchronous
4
MRDY
O Signal output to system microcomputer by which command can be received
L
H : Status output enable H
L : command can be received
5
ITRVP3
I
Play position switch (SW3) detection input
6
ITRVP2
I
Play position switch (SW2) detection input
7
ITRVP1
I
Play position switch (SW1) detection input
8
ITRYSoc
I
Sub tray open/close detection switch input
9
VSS0
-
Connect to ground
10
VDD0
-
Power supply terminal (+)
11
RESET
I
REST switch detection input (traverse mechanism)
12,13
-
Non connect
14
ICAMP1
I
Cam switch position 1 input
15
KCMND/TXD
I/O Command input from system microcomputer (synchronization) or status output (asynchronous)
16
MSTAT/RXD
I/O Status output to system microcomputer (synchronization) or command input (asynchronous)
17
KCLK
I
System microcomputer data/serial/clock input
18
SUBQ
I
Sub code Q data input
19
CDCOPY
O Right or wrong of CD copy signal output
20
SQCK
O Clock output for sub code Q register
21
CDINDEX
O CD index information
22
CDTNO
O CD track information
23
ICAMP2
I
Cam switch position 2 input
24
VDD1
-
Power supply terminal (+)
25
AVSS
-
Connect to ground for A/D converter
26
VDET_LEVEL
I
Input for vibration detecting changeable level
27
KEY2
I
Output voltage monitor of regulator (IC291)
28
TRY3CLOSE
I
Main tray 3 close switch detection input
29
TRY3OPEN
I
Main tray 3 open switch detection input
30
TRY2CLOSE
I
Main tray 2 close switch detection input
31
TRY2OPEN
I
Main tray 2 open switch detection input
32
TRY1OPEN
I
Main tray 1 open switch detection input
33
TRY1CLOSE
I
Main tray 1 close switch detection input
34
AVREF
-
Standard voltage of A/D converter and analog power supply
35
CAM_CW
O Cam motor drive signal output (clockwise)
36
RESET
I
System reset input
Содержание XL-R5020BK
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