Hong Fu Jin Precision Electrons Co. Ltd. MRDB20 用户手册
Pin definition
Pin
number
Pin Name
I/O
Description
1
SPI_SCK
I
SPI Clock, generate by host to slave.
2
GND
GND
3
SPI1_MOSI
I
SPI Master Out Slave In, serial data signal from host to module.
4
SPI1_MISO
O
SPI Master In Slave Out, serial data signal from module to host.
5
NFCI CS
I
SPI Chip Select, signal from host to module to enable SPI slave interface block onto
bus
bus
6
NFC_IRQ_OUT
O
Host interface mode control pin. Host should power up first and ensure that this line
is floating during module power up. After boot up this becomes as output. The host
shall ignore this signal for up to 10 ms after power up.
SPI interrupt signal from the module that it needs to communicate.
is floating during module power up. After boot up this becomes as output. The host
shall ignore this signal for up to 10 ms after power up.
SPI interrupt signal from the module that it needs to communicate.
7
Vcc 2.8
P
POWER
8
NFC_IRQ_IN
I
Regulator power on.
Low: shut down with all LDOs off (battery‐off still functional).
High: LDOs are available.
Low: shut down with all LDOs off (battery‐off still functional).
High: LDOs are available.
9
Vcc 3.1
P
POWER
10
Vcc 3.1
P
POWER
11
GND
GND
12
Vcc 2.8
P
POWER
13
GND
GND
14
GND
GND
15
GND
GND
16
GND
GND
17
GND
GND
18
GND
GND
NFC module B to B Connector Pin descriptions (Plug)
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