Schematics
2021.01.06
2021.01.06
VA.0
MEET ROHS/HF REQUIREMENTS
Yu.Fan Jason
2
C
B
A
C
D
6
5
4
32 1
D
B
A
FILE NAME:
COMPANY:
MODEL:
DRAWN:
DATED:
SHEET:
CHECKED:
DATED: DATED:
APPROVE:
REV:
SIZE: A4
★
GANZHOU DEHUIDA TECH. CO., LTD
ZHZHUANG
BM3502
BM3502
2021.01.06
CHG-CHGOK
CHG-ACOK
CHG-EN
SYS-ON/OFF
NTC-ADC
PWR
DC-DET
GND
5V
BAT-V
AMP-SD
GND
R+
R-
L+
L-
AMP_MUTE
R139
R147
C144
C129
C136
FB134
DZ101
R181
R190
R198
R204
R138
1
RX
1
TX
R161
C143
C151
C128
C134
L102
C141
DZ100
R169
R180
R189
D111
C150
R136
1
1
2
2
3
3
ANT100
C139
R179
1
CE#
2
SO/SIO1
3
SIO2
4
VSS
5
SI/SIO0
6
SCLK
7
SIO3
8
VCC
U116
C130
FB135
R135
1
CS#
2
DO
3
WP#
4
VSS
5
DI
6
CLK
7
HOLD#
8
VCC
U113
C135
FB136
R168
R201
C125
C127
C137
C138
R177
R133
R162
R200
R134
R143
R150
R167
R176
R186
R193
R187
R142
R149
R157
R166
R175
R185
C146
C149
1
2
3
VOL101
R141
C132
R156R165
R184
R174
C145
C148
1
S
2
G
3
D
Q103
R140
R148
1
2
3
Q116
R164
C140
R183
R192
C147
R130
C126
C131
R154
R163
R173
R182
R191
R199
R194
R197
R172
R155
R131
R132
1
2
3
4
5
6
7
8
9
10
11
12
J118
R170
R195
R178
R159
R151
R144
R202
R196
R188
R160
R152
R145
R203
R146
R137
R171
R153
1
S
2
G
3
D
Q113
1
2
3
Q115
1
2
3
4
5
J129
1
RFIO
2
GND
3
GPIO42/PWM3&5/BCLK_TX&RX/IR/1TX
4
GPIO35/SPDIF_TX/I2S_DOUT&DIN
5
PIO34/LRCLK_RX&RX
6
GPIO33/BCLK_TX&RX
7
GPIO32/MCLK_TX&RX
8
GPIO16/SPI1&2_SS/PWM4/ORX/SD0_CMD
9
GPIO11/SPI1&2_MOSI/PWM6/ADC8
10
GPIO12/PWM7/ADC9/SD1_DAT2
11
GPIO10/SPI1&MISO/ADC7/SD1_DAT0
12
GPIO8/SPI1&2SS/PWM3/ADC5/SD1_CLK
13
GPIO9/SPI1&2_CLK/PWM1/ADC6/SD1_CMD
14
GPIO13/PWM8/1RTS/SPI1_IO3
15
GPIO14/ADC11/SPI1_IO2
16
GPIO15/PWM4/1RX/SPI1_IO3/MCLK_TX&RX
17
GPIO22/PWM1/1TX/ADC2/LRCLK_TX&RX/IR
18
GPIO23/PWM2/OTX/ADC3/BCLK_TX&RX/SPDIF_TX
19
NC
20
GPIO21/SP1&2_MOSI/PWM0/TEM/I2S_MCLK
21
GPIO7/PWM0/SPDIF_RX/I2SRX
22
GPIO40/PWM2/MCLK_TX&RX
23
GPIO39/PWM1/BCLK_TX&RX
24
GPIO38/PWM0/I2SDOUT&DIN/SPDIFRX
59
GPIO0/PWM1/MCLK/TX&RX/I2C_SCL
58
GPIO2/PWM2/ADC4/LRCLK/TX&RX/ORX
57
GPIO1/PWM3/BCLK/TX&RX/SPI2_MISO/I2C_SDA
56
GPIO3/SPI1_CLK/0TX/I2SDOUT&DIN
55
GPIO19/I2C_SDA
54
RTCVDD
53
ON/OFF
52
GND2
51
VBAT
50
DC5V
49
VCC
48
PA_BYPASS
47
GPIO4/PWM1/IR
46
WIO0/ADC1
45
SVCC
44
AVCC
43
AGND1
42
AUX1R/GPIO49
41
AUX1L/GPIO48
40
AUXOR/GPIO47
39
AUX0L/GPIO46
38
AUX2R/GPIO55
37
AUX2L/GPIO54
36
MIC_INR/GPIO45/DMIC_DTA
35
MIC_INL/GPIO44/DMIC_CLK
34
VRO/GPIO51/LRCLK_TX&RX/PWM3
33
AOUTL/GPIO50
32
AOUTR/GPIO52
31
VRO_S/GPIO53/I2SDOUT&DIN/PWM5
30
AGND
29
GND1
28
DM
27
DP
26
GPIO17/SPI1&2_CLK/SD0_CLK0
25
GPIO20/PWM20/SPI1&SPI2_MISO
U124
R481
R331
C251
MARK100
MARK101
MARK102
1
T1
1
T2
1
T3
1
T4
1
T5
1
T6
1
T7
1
T8
1
T9
1
T10
1
T11
1
T12
1
T13
1
T14
1
T15
1
T16
1
T17
C169
1
T42
1
T43
1
T44
1
T45
1
T46
C330
D130
D131
R273
CE113
C377
C380
C381
C382
C383
C384
C386
C387
C388
C390
C385
C389
[3,4]
BT_4.2V
[5]
BT_ADC_KEY1
[2]
NTC_ADC
[2]
BAT_V_ADC
[5]
PWR_KEY
[2]
BT_VCC
[2]
FLA_CS1
[2]
FLASH_SO
[2]
FLASH_SIO2
[2]
FLASH_SIO3
[2]
FLASH_SCLK
[2]
FLASH_SI
[2]
FLA_CS2
[2]
FLASH_SO
[2]
FLASH_SCLK
[2]
FLASH_SI
[2]
BT_VCC
[2]
FLA_CS1
[2]
FLASH_SO
[2]
FLASH_SIO2
[2]
FLASH_SI
[2]
FLASH_SCLK
[2]
FLASH_SIO3
[3,4]
BT_I2S_BCK
[3,4]
BT_I2S_LRCK
[3]
BT_I2S_DOUT
[2]
BT_ROUT+
[2]
BT_ROUT-
[2]
BT_LOUT-
[2]
BT_LOUT+
[4]
AUXIN_R+
[3]
BT_TX
[3]
BT_RX
BGND
BGND
BGND
[4]
RGB_DATA
[2]
SYS_ON/OFF
BGND
[2]
BAT_V_ADC
[2]
BAT_V
[2]
BT_VCC
BGND
[5]
BT_KEY
[2]
DC_DET
[2]
AMP_SD
[2]
CHG_EN
[2]
CHG_ACOK
[2]
CHG_CHGOK
[2]
CHG_CHGOK
[2]
CHG_ACOK
[2]
CHG_EN
[2]
SYS_ON/OFF
[2]
NTC_ADC
[2]
PWR
[2]
DC_DET
[2,3,5]
5VIN
[2]
BAT_V
[2]
AMP_SD
[2]
BT_ROUT+
[2]
BT_ROUT-
[2]
BT_LOUT-
[2]
BT_LOUT+
[3]
AUDIO_ON
[4]
DSP_I2S_DOUT
BGND
[2]
BT_VCC
AVCC
[4]
AUXIN_L+
[4]
LED_CON1
BGND
BGND
BGND
[2]
PWR
[4]
USB-S
[4]
BT_DP
[4]
BT_DM
[2]
BAT_V
[2,3,5]
5VIN
[2,3,5]
5VIN
BGND
[2]
FLA_CS2
BGND
[2]
AMP_MUTE
[2]
AMP_MUTE
[3]
3.3V_NTC
[5]
RCAOUT_MUTE