
17
4109LS–8051–02/08
AT8xC51SND1C
6.13
A/D Controller
The AT8xC51SND1C implements a 2-channel 10-bit (8 true bits) analog to digital converter
(ADC). It is provided for the following purposes:
Battery monitoring.
Voice recording.
Corded remote control.
6.14
Keyboard Interface
The AT8xC51SND1C implements a keyboard interface allowing connection of 4 x n matrix key-
board. It is based on 4 inputs with programmable interrupt capability on both high or low level.
These inputs are available as alternate function of P1.3:0 and allow exit from idle and power
down modes.