Schematics

1
A
A
BOTTOM VIEW
VBAT
VBAT
VBAT
R9
0
U2
1
2
3
4
5
8
7
6
C16
3.3nH
C21
1uF
C2 10pF
U3
1
2
3
4
5
8
7
6
C14
9.1nH
L1
3.3nH
TP3
C19
10uF
C22
4.7uF
C9
1pF
C11
0.5pF
C24
4.7uF
U1
P20/I2C1_SCL/TCK/F_SCK
20
P21/I2C1_SDA/TMS/F_CSN
19
P22/CLK_26M/TDI/F_SI
18
P23/ADC3/TDO/F_SO
17
XO
30
XI
31
VCCPLL
32
VCCRXFE
1
ANT
2
VCCPA
3
VCCPAD
4
VCCIF
5
VSYS
6
VBAT
9
VDDAON
8
VDDDIG
7
CEN
21
P11/UART1_TXD
27
P0/UART2_TXD/I2C2_SCL
29
P1/UART2_RXD/I2C2_SDA
28
P14/SD_CLK/(Q)SPI_SCK
11
P15/SD_D3/(Q)SPI_CSN
13
P16/SD_CMD/(Q)SPI_MOSI
12
P17/SD_D0/(Q)SPI_MISO
14
P10/UART1_RXD
26
GND
33
P26/IRDA/PWM5
15
P6/CLK13M/PWM0
22
P7/WIFI_ACTIVE/PWM1
23
P8/BT_ACTIVE/PWM2
24
P9/BT_PRIORITY/PWM3
25
P24/LPO_CLK/PWM4
16
P28/RXEN/USBDN
10
X1
26M,9pF
1
1
2
2
3
3
4
4
C25
2.2uF
C23
1uF
TP4
R8 0
C3
10pF
C26
1.2pF
R3 10k
R7 18
U4
1 2 3 4 5 6
C27
1uF
C15
1.2pF
CEN
TDO_FLASH_SO/ADC3
P14
PWM5
PWM4
PWM0
UART1_TXD
UART1_RXD
UART2_TXD
PWM2
PWM1
UART2_RXD
PWM3
TCK_FLASH_SCK TMS_FLASH_CSN
TDI_FLASH_SI TDO_FLASH_SO/ADC3
PWM2 PWM1 PWM0
PWM3 PWM4
UART1_RXD
PWM5
UART1_TXD
UART2_RXD
UART2_TXD
P14
TCK_FLASH_SCK
TMS_FLASH_CSN TDI_FLASH_SI
TDO_FLASH_SO/ADC3
EN
CEN
EN
BK7321TQN32