Schematics

5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
for BT FW Update
(SPI)
CSR DEV-SYS-1808-1A
USB-SPI Converter
Wire Antenna A side
50 ohm feed line should be designed to
match 50Ωcharacteristic impedance,
depending on PCB material and thickness
GND_BT
P3V3_DIR
P3V3_DIR
P3V3_DIR
GND_BTGND_BTGND_BT
GND_BT
GND_BTGND_BT
GND_BT
GND_BT
GND_BTGND_BT
GND_BT
GND_BT
GND_BTGND_BT
GND_BT
GND_BT
GNDD GND_BT
/BT_RESET
8
/BT_MUTE
8
Rayson_RX_MOSI
8
Rayson_TX_MISO8
BT_SDATA 7
BT_LRCK 7
BT_BCK 7
Title
Size Document Number Rev
Date: Sheet
of
<Doc> EPP
Bluetooth
A3
6 9Wednesday, September 14, 2022
Title
Size Document Number Rev
Date: Sheet of
<Doc> EPP
Bluetooth
A3
6 9Wednesday, September 14, 2022
Title
Size Document Number Rev
Date: Sheet of
<Doc> EPP
Bluetooth
A3
6 9Wednesday, September 14, 2022
C201
1000P
R230
47K
R212
10K
R219
10K
+
C194
100U/25V MVE [6.3mm]
R21747
C199
N.M.(10P)
R21447
R225 47 TP70
TP67
C192
0.1U
R222 47
R221 47
P8
B6B-ZR-SM4(LF)(SN)
1
2
3
4
5
6
W25 Patern
R218 47
C198
0.1U
TP65
R226 47
R229
47K
R23610K
C193
10U 6.3V
C197
15P CH
R23147
R22747
TP66
R213
10
C200
1000P
R233 47
C195
0.1U
R23210K
TP68
R224 47
BTM-875
U26
SPKR_RN
1
SPKR_RP
2
SPKR_LN
3
SPKR_LP
4
AIO0
5
AIO1
6
GND
7
RF_IO
8
GND
9
QSPI_IO0/CAP0
10
QSPI_IO1/CAP1
11
QSPI_CLK/CAP2
12
QSPI_CSB/CAP3
13
PIO22/CAP4
14
PIO24/CAP5
15
PIO_17/PCM_IN
16
PIO_18/PCM_OUT
17
PIO_19/PCM_SYNC
18
PIO_20/PCM_CLK
19
SPI_CLK
20
SPI_MOSI
21
SPI_MISO
22
SPI_CS#
23
/RESET
24
UART_RX
25
UART_TX
26
LED0
27
LED1
28
LED2
29
PIO0
30
GND
31
PIO1
32
PIO2
33
PIO3
34
PIO4/PCM2_IN
35
PIO5/PCM2_OUT
36
PIO6/PCM2_SYNC
37
PIO7/PCM2_CLK
38
PIO10
39
PIO11
40
PIO12
41
PIO13
42
PIO14/QSPI_IO2
43
PIO15/QSPI_IO3
44
GND
45
USB_DP
46
USB_DN
47
PIO_POWER
48
1V8_SMPS
49
VBAT
50
VBAT_SENSE
51
VCHG
52
CHG_EXT
53
VREG_ENABLE
54
UART_CTS
55
UART_RTS
56
MIC_LN
57
MIC_LP
58
MIC_BIAS_A
59
MIC_RN
60
MIC_RP
61
MIC_BIAS_B
62
R215 47
R23410K
R21647
L35
BLM18PG471SN1
C196
N.M.(10P)
TP69
C191
1000P
R223 47
R220 47
R23710K
R22847
R23547
/BT_RESET
2402-2480MHz
OSC:26MHz