Touch Key Function
Each device provides multiple touch key functions. The touch key function is fully integrated and
requires no external components, allowing touch key functions to be implemented by the simple
manipulation of internal registers.
Touch Key Structure
The touch keys are pin shared with the PB, PC and PD logic I/O pins, with the desired function chosen
via register bits. Keys are organised into groups of four, with each group known as a module and
having a module number, M0 to M5.Each module contains its own control logic circuits and register
set. Examination of the register names will reveal the module number it is referring to.
Device
Keys - n
Touch Key
Module
Touch Key
Shared I/O
Pin
BS83B08-3
8
M0
K1~K4
PB0~PB3
M1
K5~K8
PB4~PB7
BS83B12-3
12
M0
K1~K4
PB0~PB3
M1
K5~K8
PB4~PB7
M2
K9~K12
PC0~PC3
BS83B16-3
BS83B16G-3
16
M0
K1~K4
PB0~PB3
M1
K5~K8
PB4~PB7
M2
K9~K12
PC0~PC3
M3
K13~K16
PC4~PC7
BS83C24-3
16
M0
K1~K4
PB0~PB3
M1
K5~K8
PB4~PB7
M2
K9~K12
PC0~PC3
M3
K13~K16
PC4~PC7
M4
K17~K20
PD0~PD3
M5
K21~K24
PD4~PD7
General Purpose Data Memory
BS83B08-3/B12-3/B16-3/B16G-3/C24-3
8-Bit Touch Key Flash MCU
Rev. 1.50
75
April 28, 2020