1、Transmitter/Receiver Circuit
R1501
0
1 2
C1524
0.5pF
12
C1525
NC_4.7nF
12
U1504
ANT_220
11J1501
MS_15602
OUT
2
GND2
4
IN 1
GND1
3GND3
5GND4
6
R1511
0
1 2
L1512
4.7nH
This circuit shows the transmitter and receiver path of GSM/DCS/PCS. The RF
signal which is amplified by RF PA transmits to antenna through antenna switch
and than eradiate to the air. R1511, L1512, C1524 make up of the antenna
matching circuit.When receiver, the antenna receive the RF signal, and then
demodulated by SI4220 after band filter.
2、Power ON/OFF Circuit
S1906
SWITCHA
1
122
S1
3
S2
4S3 5
PWRON_N
D1901
2 1
Signals(3) Interface 3OF5
U101D
HI3611
VUSB
K2
VSN
H1
CHG_SW
J2
GHG_CTRL
H2
BATT
J1
IN1
B15
IN2
A12
IN3
R1
IN4
A20
IN5
D25
IN6
P1
IN7
A8
PWR_HF
AC2
PWRON_N
B9
XTAL26_IN
F1
XTAL26_OUT
G1
XTAL24_IN
Y1
XTAL24_OUT
Y2
RTC_IN
D26
RTC_OUT
C26
VCOIN
A21
VREF
A16
RBIAS
B10
AGND1
B18
AGND2
A10
AGND3
L1
OUT0 A9
OUT1 A7
OUT2 B20
OUT3 B8
OUT4 P2
OUT5 A26
OUT6 C25
OUT7 M2
OUT8 B7
OUT9 B19
OUT10 A19
OUT11 F26
OUT12 N1
OUT13 G26
OUT14 E26
OUT15 A17
LX1 B14
VO1 B16
PGND1 A14
LX2 B12
VO2 B11
PGND2 A13
LX3 T1
VO3 T2
PGND3 R2
BT_23K_CLK B26
BT_26M_CLK E2
BTCLK_EN E1
RTC_OUT
RTC_IN
XTAL26_IN
XTAL26_OUT
PWRON_N
After inserting the battery, the 32.768KHZ crystal start to work. Now press the
power on/off switch S1906, then the inner program start initialing;Press the power
on/off switch at normal work status , CPU HI3611 will detect the signal and go to
