BS85B12-3 Datasheet, PDF (113/182 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
TKMnC1 Register
Bit
Name
R/W
POR
Bits 7~4
7
6
5
4
3
2
1
0
MnK4OEN MnK3OEN MnK2OEN MnK1OEN MnK4IO MnK3IO MnK2IO MnK1IO
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
0
0
0
For the BS85B12-3 n=0~2 while for the BS85C20-3 n=0~4.
MnK4OEN~ MnK1OEN: key selector control
MnK4OEN
0
1
M0
Key 4
M1
Key 8
M2
Key 12
Disable
Enable
M3
Key 16
M4
Key 20
MnK3OEN
0
1
M0
Key 3
M1
Key 7
M2
Key 11
Disable
Enable
M3
Key 15
M4
Key 19
MnK2OEN
0
1
M0
Key 2
M1
Key 6
M2
Key 10
Disable
Enable
M3
Key 14
M4
Key 18
Bits 3~0
MnK1OEN
0
1
M0
Key 1
M1
Key 5
M2
Key 9
Disable
Enable
M3
Key 13
M4
Key 17
I/O Pin or Touch Key Function Select
MnK4IO
0
1
M0
PC3/Key 4
M1
M3
PC7/Key 8 PD3/Key 16
I/O pin
Touch Key
M4
PD7/Key 20
MnK3IO
0
1
M0
PC2/Key 3
M1
M3
PC6/Key 7 PD2/Key 15
I/O pin
Touch Key
M4
PD6/Key 19
MnK2IO
0
1
M0
PC1/Key 2
M1
M3
PC5/Key 6 PD1/Key 14
I/O pin
Touch Key
M4
PD5/Key 18
MnK1IO
0
1
M0
PC0/Key 1
M1
M3
PC4/Key 5 PD0/Key 13
I/O pin
Touch Key
M4
PD4/Key 17
Rev. 1.00
107
February 1, 2011