Pin Description
The function of each pin is listed in the following table, however the details behind how each pin is
configured is contained in other sections of the datasheet.
BS83B08-3/B12-3/B16-3/B16G-3
Pin Name
Function
OPT
I/T
O/T
Description
PA0/SDI/SDA
PA0
PAWU
PAPU
ST
CMOS
General purpose I/O. Register enabled pull-up and
wake-up.
SDI
SIMC0
ST
¾
SPI data input
SDA
SIMC0
ST
NMOS I
2
C data
PA1/SDO
PA1
PAWU
PAPU
ST
CMOS
General purpose I/O. Register enabled pull-up and
wake-up.
SDO
SIMC0
¾
CMOS SPI data output
PA2/SCK/SCL
PA2
PAWU
PAPU
ST
CMOS
General purpose I/O. Register enabled pull-up and
wake-up.
SCK
SIMC0
ST
CMOS SPI serial clock
SCL
SIMC0
ST
NMOS I
2
C clock
PA3/SCS
PA3
PAWU
PAPU
ST
CMOS
General purpose I/O. Register enabled pull-up and
wake-up.
SCS
SIMC0
ST
CMOS SPI slave select
PA4/INT
PA4
PAWU
PAPU
ST
CMOS
General purpose I/O. Register enabled pull-up and
wake-up.
INT
INTEG
ST
¾
External interrupt
PB0/KEY1~
PB3/KEY4
PB0~PB3
PBPU
ST
CMOS General purpose I/O. Register enabled pull-up.
KEY1~KEY4
TKM0C1
NSI
¾
Touch key inputs
PB4/KEY5~
PB7/KEY8
PB4~PB7
PBPU
ST
CMOS General purpose I/O. Register enabled pull-up.
KEY5~KEY8
TKM1C1
NSI
¾
Touch key inputs
PC0/KEY9~
PC3/KEY12
PC0~PC3
PCPU
ST
CMOS General purpose I/O. Register enabled pull-up.
KEY9~KEY12
TKM2C1
NSI
¾
Touch key inputs
PC4/KEY13~
PC7/KEY16
PC4~PC7
PCPU
ST
CMOS General purpose I/O. Register enabled pull-up.
KEY13~KEY16 TKM3C1
NSI
¾
Touch key inputs
RES
Reset pin
¾
ST
¾
¾
VDD
Power supply *
¾
PWR
¾
¾
VSS
Ground **
¾
PWR
¾
¾
Note:
I/T: Input type
O/T: Output type
OPT: Optional by register selection
PWR: Power
ST: Schmitt Trigger input
CMOS: CMOS output
NMOS: NMOS output
NSI; Non-standard input
BS83B08-3/B12-3/B16-3/B16G-3/C24-3
8-Bit Touch Key Flash MCU
Rev. 1.50
9
April 28, 2020