Data Sheet

FSC‐BT646Datasheet
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 ShenzhenFeasycomTechnologyCo.,Ltd   www.feasycom.com
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 3.2  PINDefinitionDescriptions
Table2:Pindefinition
Pin PinName Type
PinDescriptions
Notes
1 UART_TX O UARTdataoutput Note1
2 UART_RX I UARTdatainput Note1
3 UART_CTS/P1.4 I UARTcleartosendactivelow
AlternativeFunction:Programmableinput/outputline
Note1
4 UART_RTS/P1.5 I/O UARTrequesttosendactivelow
AlternativeFunction:Programmableinput/outputline
Note1
5 NC  NC 
6 NC  NC 
7 NC  NC 
8 NC  NC 
9 ADC6/P3.0 I/O Programmableinput/outputline
AlternativeFunction:AnalogueprogrammableI/Oline
Note1
10 ADC7/P3.1 I/O Programmableinput/outputline 
AlternativeFunction:AnalogueprogrammableI/Oline
Note1
11 RESET I Externalresetinput:ActiveLOW,withaninteraninternalpull‐up
Setthispinlowresettoinitialstate

12 VDD Vdd Powersupplyvoltage2.0V~3.6V 
13 GND Vss PowerGround 
14 NC  NC 
15 NC  NC 
16 ICE_CLK I/O DebuggingthroughtheCLKline(Default) Note1
17 ICE_DAT I/O DebuggingthroughtheDATAline(Default) Note1
18 P2.4 I/O Programmableinput/outputline 
19 P2.5 I/O Programmableinput/outputline 
20 P2.6 I/O Programmableinput/outputline 
21 GND Vss PowerGround 
22 GND Vss PowerGround 
23 P1.0/SPI1_MOSI I/O Programmableinput/outputline
*TheI/Oportforreuse.
Note6
24 P5.7/SPI1_MISO I/O Programmableinput/outputline
*TheI/Oportforreuse.
Note6
25 P2.2/SPI1_CLK I/O Programmableinput/outputline
*TheI/Oportforreuse.
Note6
26 P3.6/SPI1_SS I/O Programmableinput/outputline
*TheI/Oportforreuse.
Note6
27 P0.4 I/O Programmableinput/outputline 
28 P2.2/SPI1_CLK I Programmableinput/outputline
*TheI/Oportforreuse.
Note6
29 P2.3/I2C1_CLK I/O Programmableinput/outputline
AlternativeFunction:I2CCLKline(Default)
Note
1,3