联想手机818原理图

原理框图Airfore platform 原理框图
Vbat Vbat Vext Vrtc Vuhf Vcp Vsim Vtic Vrf Vcc A Vcc core Vcc IO

CX77304
Li-Ion
TXGSM TR Switch TXDCS match current buffer PAC HIBAND RF C VC2 VC4 match 1800

V9 900

V8

V7

V6

V5

V4

V3

V2

V1

2.8-4.2V

match

match

BOOST DC/DC Li-ion Charger Power ADC Reset ENBL3

CX20460
CONTROL SIM LOGIC

Battery Pack

PM INTERRUPT LOW POWER POWER ON LOW1 SOFT RESET

TXEN RXEN POR

SIMDATA H SIMCLK H SIMRST H SIM EN

Vccd

Vccd

Vccd

Vccd RXI+ RXIRXQ+

Vbat

Vio Vcore RXDATA RXRATE RXCLK Vos c Vrtc RTC

RX ser ccxo tune

RXQDC DC DC SNYREF SYN_EN SYNDAT SYNCLK SYN_LE RXEN RXEN1 TXEN HIBAND PCBAND TRKHLD VDDB TXI+ TXI90 TXQ+ TXQLINE OUT+ LINE OUTSPKR O + SPKR O MICBIAS MIC IN + MIC IN LINE IN+ LINE INVC CODEC VREF CODEC adc DC

GPRS CACHE

ARM core ROM RAM SIU

clock gen Tu