C161 Datasheet, PDF (138/400 Pages) Infineon Technologies AG – 16-Bit Single-Chip Microcontroller

The figure below shows the structure of a PORT0 pin.
Internal Bus
&3,
3DUDOOHO 3RUWV
Port Output
Latch
Direction
Latch
01
AltDir
AltEN
AltDataOut
0
1
0
1
Driver
Pin
AltDataIn
P0H.7-0, P0L.7-0
Figure 7-7 Block Diagram of a PORT0 Pin
Clock
Input
Latch
User’s Manual
7-12
1999-08