Pin No. | Pin Name | I/O |
| Description | ||
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43 | AVRH | I | Reference voltage (+5V) input terminal (for A/D converter) | |||
44 | AVRL | I | Reference voltage (0V) input terminal (for A/D converter) | |||
45 |
| AVSS | — | Ground terminal (for analog system) |
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| Key input terminal (A/D input) (LSW901 to LSW908, S901 to S904) | ||
46 | KEYIN0 | I | OFF, SOURCE, SOUND, MENU, PTY DSPL, LIST, ENTER, MODE, | |||
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| SEEK/AMS | ||
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47 | KEYIN1 | I | Key input terminal (A/D input) (LSW810, LSW909 to LSW917) | |||
Z, | ||||||
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48 | RCIN0 | I | Rotary remote commander key input terminal (A/D input) | |||
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49 | DSTSEL | I | Destination setting terminal (fixed at “L” in this set) | |||
50 | QUALITY | I | Noise level detection signal input at SEEK mode (A/D input) | |||
51 | FMAGC | I | FM AGC detection signal input from the FM/AM tuner unit (TU1) (A/D input) | |||
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52 | MPTH | I | ||||
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53 |
| VSM | I | FM and AM signal meter voltage detection input from the FM/AM tuner unit (TU1) | ||
| (A/D input) |
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54 |
| VCC | — | Power supply terminal (+5V) |
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| Internal RAM reset detection signal input terminal | ||
55 | RAMBU | I | Input terminal to check that RAM data are not destroyed due to low voltage | |||
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| This checking is made within 100 msec after reset Not used (fixed at “H”) | ||
56 | TUNATT | O | Muting on/off control signal output of the FM/AM tuner signal “H”: muting on | |||
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57 | VOLATT | O | Pre amplifier muting on/off control signal output to the electrical volume (IC151) | |||
“L”: muting on |
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58 |
| ATT | O | Audio line muting on/off control signal output terminal “H”: muting on | ||
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59 | AMPON | O | Standby on/off control signal output to the power amplifier (IC611) | |||
“L”: standby mode, “H”: ampifier on |
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60 | AMPATT | O | Power amplifier muting on/off control signal output to the power amplifier (IC611) | |||
“L”: muting on |
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61 | COLSW | I | Setting terminal for the illumination color | “L”: 2 color, “H”: 1 color (fixed at “H” in this set) | ||
62 | COLSEL | I | Setting terminal for the illumination color | “L”: amber, “H”: green (fixed at “L” in this set) | ||
63 |
| VSS | — | Ground terminal |
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64 | DAVN | I | Data transmit completed detection signal input from the RDS decoder (IC51) “H” active | |||
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65 |
| FILE | I | Setting terminal for the custom file “L”: unavailable, “H”: available (fixed at “H” in this set) | ||
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66 |
| TEXT | I | Setting terminal for the CD text “L”: unavailable, “H”: available (fixed at “H” in this set) | ||
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67 | NOSESW | I | Front panel block remove/attach detection signal input from the nose detection switch (SW504) | |||
“L”: front panel is attached |
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68, 69 |
| NCO | O | Not used (open) |
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70 | I2C SIO | I/O | ||||
volume (IC151) |
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71 | I2C CKO | O | I2C bus clock signal output to the FM/AM tuner unit (TU1), RDS decoder (IC51) and electrical | |||
volume (IC151) |
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72 |
| NCO | O | Not used (open) |
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73 |
| X1A | O | Sub system clock output terminal (32.768 kHz) | ||
74 |
| X0A | I | Sub system clock input terminal (32.768 kHz) | ||
75 |
| NCO | O | Not used (open) |
| |
76 | KEYACK | I | Input of acknowledge signal for the key entry Acknowledge signal is input to accept function | |||
and eject keys in the power off status On at input of “H” | ||||||
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77 |
| BUIN | I | Battery detection signal input from the SONY bus interface (IC701) and battery detect circuit | ||
| “L” is input at low voltage |
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47
