•MAIN BOARD IC600 MB90574BPMT-G-265-BND (SYSTEM CONTROLLER)
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1 |
| NC | O | Not used (open) |
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2 |
| AMSIN | I | Whether a music is present or not from CXA2510AQ (IC250) is detected at auto music sensor | ||||
| “L”: music is present, “H”: music is not present |
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3 |
| AMSON | O | Tape auto music sensor control signal output to the CXA2510AQ (IC250) | ||||
| “L” is output to lower the gain for audio level at FF/REW mode | |||||||
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4 |
| SA LAT | O | Serial data latch pulse output for spectrum analyzer section to the liquid crystal display drive | ||||
| controller (IC800) |
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5 |
| ATT | O | Audio line muting on/off control signal output terminal | “H”: muting on | |||
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6 |
| SYSRST | O | System reset signal output to the liquid crystal display drive controller (IC800) and SONY bus | ||||
| interface (IC500) “L”: reset |
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7 |
| F/R | O | Forward/reverse direction control signal output to the CXA2510AQ (IC250) | ||||
| “L”: reverse direction, “H”: forward direction |
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8 |
| VCC | — | Power supply terminal (+5V) |
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9 |
| TAPE ATT | O | Tape muting on/off control signal output to the CXA2510AQ (IC250) “H”: muting on | ||||
| Active at ATA, FF/REW mode |
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10 | T. | I/O | ||||||
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11 | T. | I/O | ||||||
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12 |
| RX | I | Input terminal at the flash memory data write mode |
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| Front panel open/close detection signal input terminal |
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| “L” is input when the front panel is closed |
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13 |
| TX | O | Output terminal at the flash memory data write mode |
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| Display serial data output to the liquid crystal display driver (IC901) | |||||||
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14 |
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| O | Bus on/off control signal output to the liquid crystal display drive controller (IC800) and SONY | ||||
| bus interface (IC500) “L”: bus on |
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15 |
| BEEP | O | Beep sound drive signal output terminal |
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16 |
| NC | O | Not used (open) |
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17 |
| UNISI | I | Serial data input from the SONY bus interface (IC500) |
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18 |
| UNISO | O | Serial data output to the SONY bus interface (IC500) |
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19 |
| UNICKO | O | Serial clock signal output to the liquid crystal display drive controller (IC800) and SONY bus | ||||
| interface (IC500) |
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20 |
| I | Tuner wide/narrow select signal input terminal | “L”: wide, “H”: narrow | ||||
| Not used (fixed at “L”) |
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21 |
| SW SHIFT | O | Not used |
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22, 23 |
| NC | O | Not used (open) |
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24 |
| SIRCS | I | Sircs remote control signal input from the remote control receiver (IC951) | ||||
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25 |
| DSPSI | I | Serial data input from the CXD2726Q (IC100) |
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26 |
| DSPSO | O | Serial data output to the CXD2726Q (IC100) |
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27 |
| DSPCKO | O | Serial data transfer clock signal output to the CXD2726Q (IC100) and liquid crystal display drive | ||||
| controller (IC800) |
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28 |
| DSPPLL | O | PLL clock control signal output terminal Not used (open) | ||||
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29 |
| DSPMST | O | Bit clock (BCK) and L/R sampling (LRCK) signal master/slave mode selection signal output | ||||
| terminal “L”: master mode, “H”: slave mode | Not used (open) | ||||||
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30 |
| NC | O | Not used (open) |
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31 |
| VOLATT | O | Pre amplifier muting on/off control signal output to the electrical volume (IC10) | ||||
| “L”: muting on |
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32 |
| TUMUTE | O | Muting on/off control signal output of the FM/AM tuner signal “L”: muting on | ||||
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33 |
| VSS | — | Ground terminal |
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34 |
| C | — | Connected to coupling capacitor for the power supply | Not used (open) | |||
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36
