5
4
3
2
1
physical reset button
GSM_reset
D1 +BATT BAT64
GSM_IGT
IGT
R18 10k 1
Q1
3 2 40 /IGT 41 33 32 15 17 37 34 35 39 14 16 36 38 13 18 1 4 2 5 6 3
GSM/GPRS-Engine EMERGOFF IGT DSR0 RING0 RXD0 TXD0 CTS0 RTS0 DTR0 DCD0 RxD1 TXD1 RTS1 CTS1 SYNC VDDLP CCCLK CCRST CCVCC CCIN CCGND CCIO U9 VBATT VBATT VBATT VBATT VBATT GND GND GND GND GND GND CHARGE POWER AKKU_TEMP VDD MICP2 MICN2 EPP2 EPN2 MICP1 MICN1 EPP1 EPN1 26 27 28 29 30 25 24 23 22 21 42 20 19 12 31 45 46 49 50 44 43 48 47
keep line resistance small
+ C18 10pF GND GND charge power GND C17 100uF GND
+
D
D
BC847 GND GSM_DSR GSM_Ring GSM_RX GSM_Tx GSM_CTS GSM_RTS GSM_DCD DSR0 RING0 RxD0 TxD0 CTS0 RTS0 DCD0 GND GSM_RX1 GSM_Tx1 GSM_RTS1 GSM_CTS1 R20 1k DSR0 RING0 RxD0 R19 1k CTS0 RTS0 DCD0
< RV1 10k
1
BT1 4.2V GND
ESD
GND
GND D7 5.6V
2
GSM_active
C19 47nF
C20 47nF L1 L2 L3 L4 <
SPEAKER LS1
C21 10nF +3.0V e.g. portpin C22 100nF R23 2.7k R24 10R R25 10R C25 100nF R26 2k C31 10nF GND_ANA GND_ANA EPP1 EPN1 L8 GND 0R R29 GND_ANA C35 47nF C36 47nF GND GND_ANA R31 470k +3.0V R27 2.2k + C32 22uF 1 3 GND BAV99/SOT GND C33 10pF GND GND L6 L7 1 D2 +3.0V +3.0V 2 C23 10pF 2 4 C24 D3 10pF 3 GND BAV99_double L5
U10 << 2 1 Pads <
MIC1
MICROPHONE
R21 R22
6R8 6R8
X2 1 2 3 C34 27pF SIM R28 0R CCVCC CCRST CCCLK GND CCVPP CCIO 5 6 7 GND C26 27pF C27 100nF C28 100nF C29 1nF + C30 100uF
RFSDAI TXDDAI RXDDAI TFSDAI SCLK
C
if microphone is placed on the PCB, L3 and L4 are not necessary

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