Read Sony SRF-DR2000 Service Manual online
– 9 –
Pin No.
Pin name
I/O
Description
1
MUTE
O
Mute signal output.
2
BEEP
O
Beep signal output.
3
DEC INT
I
Interrupt signal input from decoder IC (IC204).
______
4
BUSY
I
Busy signal input from DE-SCRAMBLE MICOM (IC301).
5
F3
I
Function 3 key input.
6
F5
I
Function 5 key input.
7
F4
I
Function 4 key input.
8
(–)
I
Tune (–) key input.
9
VDD
–
Power supply (+3V).
10
VREF
–
Voltage reference terminal.
11
AGND
–
Ground for analog.
12 - 15
AI0 - AI3
–
Not used (Ground connect).
16
GND
–
Ground.
17
VDD
–
Power supply (+3V).
18
READY PLL
I
Input PLL ready OK signal.
19
REQ PLL
O
PLL communication request output terminal.
20
DATA PLL
O
PLL serial data output terminal.
21
CLOCK PLL
O
PLL serial clock output terminal.
22
DI EEP
I
Data read input from EEPROM.
23
DO EEP
O
Data write output to EEPROM.
24
CLK EEP
O
Clock output to EEPROM.
25
CS EEP
O
Chip select output to EEPROM.
26
F2
I
Function 2 key input.
27
DISPLAY
I
Display (FM data) key input.
28
SAVE
I
Save key input.
29
F1
I
Function 1 key input.
30
ENTER
I
Enter key input.
31
BACK
I
Back key input.
32
FLA CLK
–
Not used (“H” level).
33
FLA DAT
–
Not used (“H” level).
____
34
RES
I
System reset terminal.
35
NMI
Not used (“H” level).
___
36
EA
I
Internal memory selection. “H” : Active
37
VDD
–
Power supply (+3V).
38
OSC0
I
Main system clock oscillator (4.9152 MHz).
_____
39
OSS1
O
Main system clock oscillator (4.9152 MHz).
40
GND
–
Ground.
41
OSC CNT
O
Clock oscillator control.
42 - 46
–
Not used (Open).
___
47
RD
O
External memory read output. “L” : Reading
___
48
WR
O
External memory write output. “L” : Writing
49
–
Not used (Open).
50
ALE
O
Address latch signal output to external memory.
51 - 58
D0 - D7
I/O
Address / data bus input / output to external memory.
59 - 65
A8 - A14
O
Address bus output to external memory.
66
–
Not used (Open).
67
VDD
–
Power supply (+3V).
68
GND
–
Ground.
SECTION 4
DIAGRAMS
4-1. EXPLANATION OF IC TERMINALS
IC101 MSM65587 (MAIN SYSTEM CONTROL)
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