SAA-XC886CLM Datasheet, PDF (70/134 Pages) Infineon Technologies AG – 8-Bit Single Chip Microcontroller

SAA-XC886CLM
Figure 18 shows the structure of a bidirectional port pin.
Functional Description
Internal Bus
AltDataOut 3
AltDataOut 2
AltDataOut1
AltDataIn
Px_PUDSEL
Pull-up/Pull-down
Select Register
Px_PUDEN
Pull-up/Pull-down
Enable Register
Px_OD
Open Drain
Control Register
Px_DIR
Direction Register
Px_ALTSEL0
Alternate Select
Register 0
Px_ALTSEL1
Alternate Select
Register 1
11
10
01
00
Out
Px_Data
Data Register In
enable
Output
Driver
enable
Input
Driver
Schmitt Trigger
Figure 18 General Structure of Bidirectional Port
VDDP
enable ^Pull
Up
Device
Pin
enable ^Pull
Down
Device
Pad
Data Sheet
63
V1.1, 2010-08