DPC-MP727/MP922
CIRCUIT DESCRIPTION
1. Port Description of Microprocessor
ACTIVE
Port No.Port NameI/OFunction
HL
1P60ODSP (IC3) reset output.
2P61-Unused.
3P62ODSP (IC3) power down control.ONOFF
4P63-Unused.
5~12P50~P57-Unused.
13~16P20~P23-Unused.
17VDD-+3.0v power supply.
18PB0-Unused.
19VSS-GND
20XI,PB1-Unused.
21XO-Unused.
22VDD-+3.0v power supply.
23OSCIICrystal oscillation circuit input.
24OSCOOCrystal oscillation circuit output.
25MODE-Connected to VDD.
26MCLKODSP (IC15) command clock signal output.
27MDATAODSP (IC15) data signal output.
28MLDODSP (IC15) command load signal output.
29DSPRSTODSP (IC15) reset signal output.
30IPFLAGIUnused.
31,32PCON4,3-Unused.
33PCON2ORF AMP power down control.
34AVDD-+3.0v analog power supply.
35PCON1OSystem power supply control.ON
36AMUTEOAudio mute control.ON
37HPMUTEOHeadphones mute control.ON
38RWSELORF gain control.
39STATIStatus signal input from DSP (IC15).
40ACDETIDetection port of AC adaptor.DETECTED
41BBSTOControl port of bass boost.OFFON
42HOLDIInput port of hold switch.OFFON
43VREF--GND
44LBATTIBattery level detection port.
45VOLUMEIInput port of volume.
46P46OCrystal oscillation circuit is stopped when in stop mode(Hi).
47P47,WDOUT-Unused.
48LEDDRV-Unused.
49ELDDRV-Unused.
50CHGORechargeable active output. Batt. charge ON : H
51LCDSDOSerial data output for LCD.
52LCDRMC-Unused.
53PB5-Unused.
54VREF+-+3.0v power supply.
55,56PB6,7-Unused.
57MP3 MLDOCommand load output for MP3.
58MP3 RESETOReset output for MP3.
59DATA STOPOData signal output for MP3.
60P93-Unused.
61AVSS-GND
62,63KEY1, 2I Key signal input.
64KEYEXTIRemote control signal input.
Detection port for low rechargeable battery.
65RCHDETI
Detected : more than 0.2V
66VDD-+3.0v power supply.
3 |