BS66F340 Datasheet, PDF (199/256 Pages) Holtek Semiconductor Inc – Enhanced Touch A/D Flash MCU with LED Driver

BS66F340/BS66F350/BS66F360/BS66F370
Enhanced Touch A/D Flash MCU with LED Driver
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 I/O pins, with the desired function chosen via the pin-shared
selection register bit. Keys are organised into several groups, with each group known as a module
and having a module number, M0 to Mn. Each module is a fully independent set of four Touch Keys
and each Touch Key has its own oscillator. 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
BS66F370
BS66F360
BS66F350
BS66F340
Total Key Number
36
28
20
12
Touch Key Module
M0
M1
M2
M3
M4
M5
M6
M7
M8
M0
M1
M2
M3
M4
M5
M6
M0
M1
M2
M3
M4
M0
M1
M2
Touch Key
KEY1~KEY4
KEY5~KEY8
KEY9~KEY12
KEY13~KEY16
KEY17~KEY20
KEY21~KEY24
KEY25~KEY28
KEY29~KEY32
KEY33~KEY36
KEY1~KEY4
KEY5~KEY8
KEY9~KEY12
KEY13~KEY16
KEY17~KEY20
KEY21~KEY24
KEY25~KEY28
KEY1~KEY4
KEY5~KEY8
KEY9~KEY12
KEY13~KEY16
KEY17~KEY20
KEY1~KEY4
KEY5~KEY8
KEY9~KEY12
Touch Key Structure
Rev. 1.40
199
December 15, 2016