BS85B12-3/BS85C20-3/BS85C20-5
Touch Key Flash MCU with LCD/LED Driver
Pin Description
Theꢀfunctionꢀofꢀeachꢀpinꢀisꢀlistedꢀinꢀtheꢀfollowingꢀtable,ꢀhoweverꢀtheꢀdetailsꢀbehindꢀhowꢀeachꢀpinꢀisꢀ
configuredꢀisꢀcontainedꢀinꢀotherꢀsectionsꢀofꢀtheꢀdatasheet.
BS85B12-3
Register
Select
Pin Name
Function
I/T
O/T
CMOS General pꢀrpose I/O. Reꢁister enabled pꢀll-ꢀp and wake-ꢀp.
SPI data inpꢀt
Description
P�WU
P�PU
P�0
ST
P�0/SDI/SD�
SDI
SIMC0
SIMC0
ST
ST
—
SD�
NMOS I2C data I/O
P�WU
P�PU
P�1
ST
CMOS General pꢀrpose I/O. Reꢁister enabled pꢀll-ꢀp and wake-ꢀp.
P�1/TCK1/
INT1/SSEG10
TCK1
INT1
TM1C0
INTC0
ST
ST
—
—
—
Timer Modꢀle 1 inpꢀt
External interrꢀpt 1 inpꢀt
SSEG10 SLCDCn
LCD Software controlled LCD SEG
P�WU
P�PU
P�2
ST
CMOS General pꢀrpose I/O. Reꢁister enabled pꢀll-ꢀp and wake-ꢀp.
P�2/SCK/SCL
P�3/SCS
SCK
SCL
SIMC0
SIMC0
ST
ST
CMOS SPI serial clock
NMOS I2C clock
P�WU
P�PU
P�3
SCS
P�4
ST
ST
ST
CMOS General pꢀrpose I/O. Reꢁister enabled pꢀll-ꢀp and wake-ꢀp.
CMOS SPI slave select
SIMC0
P�WU
P�PU
CMOS General pꢀrpose I/O. Reꢁister enabled pꢀll-ꢀp and wake-ꢀp.
P�4/TCK0/
INT0/SSEG11
TCK0
INT0
TM0C0
INTC0
ST
ST
—
—
—
Timer Modꢀle 0 inpꢀt
External interrꢀpt 0 inpꢀt
SSEG11 SLCDCn
LCD Software controlled LCD SEG
P�WU
P�PU
P�5
ST
—
CMOS General pꢀrpose I/O. Reꢁister enabled pꢀll-ꢀp and wake-ꢀp.
LCD Software controlled LCD SEG
P�5/SSEG12
P�6/SSEG13
P�7/SDO
SSEG12 SLCDCn
P�WU
P�PU
P�6
ST
—
CMOS General pꢀrpose I/O. Reꢁister enabled pꢀll-ꢀp and wake-ꢀp.
LCD Software controlled LCD SEG
SSEG13 SLCDCn
P�WU
P�PU
P�7
ST
CMOS General pꢀrpose I/O. Reꢁister enabled pꢀll-ꢀp and wake-ꢀp.
SDO
SIMC0
PBPU
—
ST
ST
—
CMOS SPI data oꢀtpꢀt
PB0
CMOS General pꢀrpose I/O. Reꢁister enabled pꢀll-ꢀp.
CMOS TM0 I/O
PB0/TP0_0/
SCOM0
TP0_0
SCOM0
PB1
TMPCn
SLCDCn
PBPU
LCD Software controlled LCD COM
CMOS General pꢀrpose I/O. Reꢁister enabled pꢀll-ꢀp.
CMOS TM0 I/O
ST
ST
—
PB1/TP0_1/
SCOM1
TP0_1
SCOM1
PB2
TMPCn
SLCDCn
PBPU
LCD Software controlled LCD COM
CMOS General pꢀrpose I/O. Reꢁister enabled pꢀll-ꢀp.
CMOS TM1 I/O
ST
ST
—
PB2/TP1B_0/
SCOM2
TP1B_0
SCOM2
PB3
TMPCn
SLCDCn
PBPU
LCD Software controlled LCD COM
CMOS General pꢀrpose I/O. Reꢁister enabled pꢀll-ꢀp.
CMOS TM1 I/O
ST
ST
—
PB3/TP1B_1/
SCOM3
TP1B_1
SCOM3
TMPCn
SLCDCn
LCD Software controlled LCD COM
Rev. 1.20
11
�ꢀꢁꢀst 10ꢂ 2012
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
