XR-50B
WIFI module
C
opyright © 2019 Shenzhen
JiXinInteligence Co., Ltd All Rights Reserved
Page 8 of 17
7
PA3
SPI1_CS0
；
SD_DATA1
；
CSI_D3; UART0_RX
；
EINTA3
PA18;
TWI0_SDA;
IR_TX;
FEM_CTRL2;
IR_RX;
EINTA18
8
GND
Ground
9
PB3
SWD_TCK; JTAG_TDI; PWM7/ECT7 ;FLASH_HOLD/IO
；
EINTB3
10
PB2
SWD_TMS; JTAG_TD0 ;PWM6/ECT6; FLASH_WP/IO2
；
EINTB2
11
PB16
SD_CMD;EINTB16
12
PB17
SD_DATA0;EINTB17
13
PB18
SD_CLK;EINTB18
14
GND
Ground
15
LOUTP
Audio DAC output p
16
AGND
Analog ground
17
MBIAS1 MIC1 Bias voltage output
18
MIC1-
MIC1-
19
MIC1+
MIC1+
20
MBIAS2 MIC2 Bias voltage output
21
LINEINP line-in input p
22
LINEINN line-in input n
23
AGND
Analog ground
