BS85B12-3_12 Datasheet, PDF (13/183 Pages) Holtek Semiconductor Inc – Touch Key Flash Type 8-Bit MCU with LCD/LED Driver

BS85B12-3/BS85C20-3/BS85C20-5
Touch Key Flash MCU with LCD/LED Driver
Pin Name
Function
Register
Select
I/T
O/T
Description
PC7
PCPU ST CMOS General purpose I/O. Register enabled pull-up.
PC7/PINT/
PINT
SSEG7/KEY8 _SSEG7
MFI3 ST
SLCDCn —
— Peripheral interrupt input
LCD Software controlled LCD SEG
KEY8
TKMnC1 NS
— Touch key input
KEY9
KEY9
—
NS — Touch key input
KEY10
KEY10
—
NS — Touch key input
KEY11
KEY11
—
NS — Touch key input
KEY12
KEY12
—
NS — Touch key input
VDD
VDD
— PWR — Power supply
VSS
VSS
— PWR — Ground
Note: I/T: Input type
O/T: Output type
Register Select: Indicates register which selects alternative function
PWR: Power
ST: Schmitt Trigger input
CMOS: CMOS output
NMOS: NMOS output
LCD: LCD COM or SEG Vbias output
NS: Non-standard input or output
The pins in the table reflect that of the package with the largest number of pins. For this reason not all pins
may exist on all package types.
BS85C20-3
Pin Name
Function
Register
Select
I/T
PA0
PA0/SDI/SDA _SDI
PAWU
PAPU
ST
SIMC0 ST
SDA
SIMC0 ST
PA1
PA1/TCK1/ _TCK1
INT1/SSEG10
INT1
PAWU
PAPU
ST
TM1C0 ST
INTC0 ST
SSEG10 SLCDCn —
PA2
PA2/SCK/SCL _SCK
PAWU
PAPU
ST
SIMC0 ST
SCL
SIMC0 ST
PA3
PA3/SCS
SCS
PAWU
PAPU
ST
SIMC0 ST
PA4
PA4/TCK0/ _TCK0
INT0/SSEG11
INT0
PAWU
PAPU
ST
TM0C0 ST
INTC0 ST
SSEG11 SLCDCn —
O/T
Description
CMOS General purpose I/O. Register enabled pull-up and wake-up.
— SPI data input
NMOS I²C data I/O
CMOS General purpose I/O. Register enabled pull-up and wake-up.
—
—
LCD
Timer Module 1 input
External interrupt 1 input
Software controlled LCD SEG
CMOS General purpose I/O. Register enabled pull-up and wake-up.
CMOS SPI serial clock
NMOS I²C clock
CMOS General purpose I/O. Register enabled pull-up and wake-up.
CMOS SPI slave select
CMOS General purpose I/O. Register enabled pull-up and wake-up.
—
—
LCD
Timer Module 0 input
External interrupt 0 input
Software controlled LCD SEG
Rev. 1.20
13
August 10, 2012