Sony SPP-69, Service Manual

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• IC501 SH66356C-4L62 (SYSTEM CONTROL) (HANDSET)
Pin No. Pin Name I/O Pin Description
1 TEST CH O Test mode channel control output (L: Active)
2 KEY LED O Key LED ON/OFF control output (L: ON) (Fixed at “H” in this set.)
3 SIG-IN I RSSI/PLL-LOCK signal input (L: RSSI, H: PLL-LOCK)
4 PLL-STB O Strobe signal output to PLL.
5 PLL-DATA O Serial data output to PLL.
6 NC — Not used. (Open)
7 PLL-CLK O Serial clock output to PLL.
8 RX-DATA I RX data input
9, 10 TX-DATA O TX data output
11 BEEP O Beep signal output
12 HOLD I Hold control input (L: Hold)
13 TX +B CTRL O TX B+ ON/OFF control output (L: TX ON)
14 RX +B CTRL O RX B+ ON/OFF control output (L: RX ON)
15 TEST I Test pin (Connect to ground in this set.)
16 VSS — Ground
17 OSC1 I Crystal oscillation input (4.048 MHz)
18, 19 NC — Not used. (Open)
20 OSC2 O Crystal oscillation output (4.048 MHz)
21 RESET I System reset input (L: Reset)
22, 23 ACT3, 4 O Intermittent reception activation control (L: Active)
24 – 27 COL0 – 3 I Key input 0 – 3
28 MIC O Microphone bias output control
29 ROW1 O Key scan output 1
30 NC — Not used. (Open)
31 – 34 ROW2 – 5 O Key scan output 2 – 5
35, 36 — — Not used. (Open)
37 BATT-LOW I Battery low level detection input
38 CHG-DET I Charge detection input (H: Charge)
39 VDD — Power supply pin (+3 V)
40 TEST SW I Test mode activation input (H: Start)
41 — — Not used. (Connect to ground.)
42, 43 NC — Not used. (Open)
44 TEST ACT I During test mode, causes start of intermittent operation with external input.
45 RSSI H/L O RSSI sensitivity select output (L: Low sensitivity)
46 H.MUTE O Half mute control output (L: Mute ON)
47 BATT-DET I Battery detection input (H: Battery detection)
48 LED O TALK/BATT LOW LED control output (L: LED ON)
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