AIWA XPR220
Service Manual

IC, MN101C439-AK
Pin No. 1~7 8 9 10 11 12 13 14 15 16,17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 Pin Name NC VDD OSC2 OSC1 VSS XI XO MMOD VREFNC ACIN VDIN NC SWHO SWEASS SWRE VREF+ MDATA STAT MCLK TU-TXD TU-RXD TU-CLK BEEP RST NRST SW-IL PC CD-RW MLD BLKCK NC NC TU CS PU-ON EASSON NC CD-DATA-REQ NC NC I/O I I O I I I I I I O I O O I I O I O I O O O I I O O O Not connected. Micro-computer power voltage (2.8 V). Not used. Main clock oscillator (8.4 MHz). Micro-computer GND. Sub clock input. (Connected to GND) Sub clock output. (Not used) Memory mode switch input. (Connected to GND) A/D converter GND. Connected to GND. AC adaptor detection terminal. Battery voltage measuring terminal. Connected to GND. HOLD/RESUME SW input. �L�=HOLD/RESUME ON. EASS mode SW input terminal. RESUME SW input. �L�=RESUME ON. AD converter supply. DSP MDATA output. DSP STAT input. DSP MCLK output. Tuner Micon data output. Tuner Micon data input. Tuner CLK input. Buzzer output for headphone. Micro-computer reset input. DSP RESET output. Pickup inner circumference limit SW. CD servo driver power OFF output. �L� power OFF. Switch CD / CD RW and LD ON. DSP MLD output. DSP BLKCK input. Connected to GND. Connected to GND. Tuner CS input. RF AMP power down output. Gain up in EASS selection output. EASS ON = �L�, OFF = �H�. Not connected. CD tuner data request output. Not connected. Not connected. Description

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