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30 SPEAKER RECEIVER MIC 32 66 67 72
Speech Decoding Speech Encoding Burst Decoding Burst Encoding
23 22 19 25 26 24
RXDA TXDA RSSI SYDA SYEN SYCL RF Module
D/A A/D
Analog Front End CHARGE(+) CHARGE CHARGE CIRCUIT CONTACTS Q4,Q5,Q9
R7
ADPCM Codec Filter DSP
RF Interface BMC
CN6
CHARGE
62
16
XTAL X1 10.368 MHz BATTERY ON SWITCH
CHARGE DETECT 52 EEPROM SCL 45 SDA 44 VBAT1 58 17
CHARGE(-) D7 J1 BATTERY TERMINAL J2
IC3
SWITCHED SUPPLY Q1 4.0V
61
DC/DC-SWITCH 56 2.5V 2.5V Q3 59 1.8V 60 1.8V Q2 RS 11 77 6 9 10 7 75 46 BBIC
IC1
CPU
1,12,40,76
ROWS
KEYPAD 27,28,34,35,36,74 COLUMNS
LCD
RESET CS SI SCL
LCD-BACK LIGHT KEY-BACK LIGHT SP-PHONE LIGHT
KX-TCA121 BLOCK DIAGRAM (HANDSET)