XC886/888CLM
Parallel Ports
User’s Manual
6-4
V1.3, 2010-02
Parallel Ports, V 1.0
activated while register P2_PUDEN enables or disables the pull device. The analog input
(AnalogIn) bypasses the digital circuitry and Schmitt-Trigger device for direct feed
through to the ADC input channel.
Figure 6-2
General Structure of Input Port
Px_DATA
Data Register
Internal Bus
AltDataIn
Px_PUDEN
Pull-up/Pull-down
Enable Register
Px_PUDSEL
Pull-up/Pull-down
Select Register
In
Input
Driver
Schmitt Trigger
AnalogIn
Px_DIR
Direction Register
Pad
Pull
Up
Device
Pull
Down
Device
VDDP
enable
enable
enable
Pin
*