BS85B12-3 Datasheet, PDF (10/182 Pages) Holtek Semiconductor Inc – Touch Key Flash Type 8-Bit MCU with LCD/LED Driver

BS85B12-3/BS85C20-3
Touch Key Flash MCU with LCD/LED Driver
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.
BS85B12-3
Pin Name
Function
PA0
PA0/SDI/SDA _SDI
SDA
PA1
PA1/TCK1/ _TCK1
INT1/SSEG10
INT1
SSEG10
PA2
PA2/SCK/SCL _SCK
SCL
PA3/SCS
PA3
SCS
PA4
PA4/TCK0/ _TCK0
INT0/SSEG11
INT0
SSEG11
PA5
PA5/SSEG12
SSEG12
PA6
PA6/SSEG13
SSEG13
PA7/SDO
PB0/TP0_0/
SCOM0
PB1/TP0_1/
SCOM1
PA7
SDO
PB0
TP0_0
SCOM0
PB1
TP0_1
SCOM1
Register
Select
I/T
O/T
Description
PAWU
PAPU
ST CMOS General purpose I/O. Register enabled pull-up and wake-up.
SIMC0
SIMC0
ST
¾ SPI data input
ST NMOS I²C data I/O
PAWU
PAPU
ST CMOS General purpose I/O. Register enabled pull-up and wake-up.
TM1C0 ST
¾ Timer Module 1 input
INTC0 ST
¾ External interrupt 1 input
SLCDCn ¾ LCD Software controlled LCD SEG
PAWU
PAPU
ST CMOS General purpose I/O. Register enabled pull-up and wake-up.
SIMC0
SIMC0
ST CMOS SPI serial clock
ST NMOS I²C clock
PAWU
PAPU
ST CMOS General purpose I/O. Register enabled pull-up and wake-up.
SIMC0 ST CMOS SPI slave select
PAWU
PAPU
ST CMOS General purpose I/O. Register enabled pull-up and wake-up.
TM0C0 ST
¾ Timer Module 0 input
INTC0 ST
¾ External interrupt 0 input
SLCDCn ¾ LCD Software controlled LCD SEG
PAWU
PAPU
ST CMOS General purpose I/O. Register enabled pull-up and wake-up.
SLCDCn ¾ LCD Software controlled LCD SEG
PAWU
PAPU
ST CMOS General purpose I/O. Register enabled pull-up and wake-up.
SLCDCn ¾ LCD Software controlled LCD SEG
PAWU
PAPU
ST CMOS General purpose I/O. Register enabled pull-up and wake-up.
SIMC0 ¾ CMOS SPI data output
PBPU ST CMOS General purpose I/O. Register enabled pull-up.
TMPCn ST CMOS TM0 I/O
SLCDCn ¾ LCD Software controlled LCD COM
PBPU ST CMOS General purpose I/O. Register enabled pull-up.
TMPCn ST CMOS TM0 I/O
SLCDCn ¾ LCD Software controlled LCD COM
Rev. 1.00
4
February 1, 2011