U1
DACR DACL DACVDD VCOM DACVSS FMIP PLLAVSS PLLAVDD LDO_IN AVDD BT_RF AVSS BTXOSCO BTXOSCI
28 27 26 DACVDD 25 24 23 22 21 C3 105 C7
DACR DACL C6 105 105 LINEL C25 L3 LINER C49 R8 FM_ANT C26 LINE_EN C19
2 VCC3V7 1 SP2
LED1
RED
R23 47K 2 S5 RESET
R51 47K
PPLED
2 R7 1K
1
LED2
BLUE
C14 105
INR
INL
1
S2 L2 NC
MODE
R42
9K1 6K2 3K
MT3608
S3 NEXT/VOL+ S4 PREV/VOL-
R50 R56
USB供电,
分升压和不分压两种方式可选。
VCC3V7 R2 0R USBDM USBDP C47 104 C42 100P VBUS 1 2 3 4 5 6 VBUS DM 22K上拉电阻一定要放在主控IC这边.
充电
POWER
DACR DACL USB1 MICRO VBUS DM DP ID GND 1 2 3 4 5 6 7 8 9 10
D2 1N5819 1
R6 2R2
R5 4.7K 102 C36 C37 102
VCC3V7 220uF
BAT
2
VBAT+
2 1
2
C25，L3尽量靠IC放 QQ:1207435600 C15，L4尽量靠IC放 模拟地尽量接功放地或者电池地 USBDM、USBDP尽量走差分线，远离其它的信号线
MCU
LINE&MIC
MIC R3 DACVDD C9 105 1K
C32
1 + 2 MIC
TF卡
VCC3V3 SD_CMD SD_CLK SD_DAT
R27
4R7 1 2 3 4 5 6 7 8 9 10 11 12 13
R34 2.2K C33 102 C46 NC
MIC LINER VCC3V3 LINEL USBDM USBDP
1 2 3 4 5 6 7
PC15 PC13 PC12 USBDM USBDP VSSIO VDDIO PA14 PA11 PA10/PA8 PA3 PA2 PA1 PA0
22K
B 1
+
105 C20
105 C27
Q2 S8550 3 C 1
VBAT+ 2 R26 100R 1 AGND 1 L1 0R R21
3
1
2 E
Si2301
VCC3V7
R11
C29
Q1 1 2 3 C Q3 8050 2 E 1 B POWER R22 1K D1
2
POWER_ON/OFF
R46 47K VCC3V7 MUTE 2 VCC3V7 1 SP1 R41 47K R1 3.3K 1 2 3 4 5 6 7 8 U5 SHDN HP-IN GND GND OUTA- OUTBVDD VDD OUTA+ OUTB+ INAINBGND BYPASS INA+ INB+ 4863 16 15 14 13 12 11 10 9 L7 100MHz&600R FM-ANT 2 1K R55
R30
SD_CLK
1 4 2 3
R35 R54
D2 D3/CS CMD/DI VDD CLK VSS D0/DO D1 CD WP GND
TF1 TF-CARD-Q
LINE
VCC3V3 22K D4 R4 24K ADK
C4 105
MUTE POWER PPLED SD_CLK SD_CMD SD_DAT ADK
X1
按键功能可以根据要求可改
C2
R10 R9 LINE_EN
0R
24M晶振尽量靠IC放，
如果按键要分板时,
S6
PP/TEL
两个信号线要用GND围起来。
AMP
R13 4.7K R39 10K INR R40 10K INL C41 C40 224 224 C39 C30 102 102 C22 C23 105 105
8 9 10 11 12 13 14
RF_ANT
20 VCC3V7 19 18 17 16 C1 15 C8
C5 105 105 L4 C15
KEY
POWER_ON/OFF S1 P/P
USB
VCC3V7 C43 105/NC C10 NC
U9 6 5 4 NC VIN EN SW GND FB 1 2 3 VBUS