C508_01 Datasheet, PDF (67/267 Pages) Infineon Technologies AG – 8-Bit CMOS Microcontroller

C508
On-Chip Peripheral Components
Table 6-1 C508 Port Structure Types
Type Description
A
Standard digital I/O ports which can also be used for external address/data
bus.
B
Standard multifunctional digital I/O port lines.
C
Digital/analog uni-directional input port.
D
Standard digital I/O with push-pull drive capability.
Type A and B port pins are standard C501 compatible I/O port lines which can be used
for digital I/O. Type A port (Port 0) is also designed for accessing external data or
program memory. Type B port lines are located at Port 2, Port 3, and Port 5 to provide
alternate functions for the serial interface, LED drive interface, and PWM signals; or are
used as control outputs during external data memory accesses. Type C port (Port 4)
provides the analog input port. Type D port lines can be switched to push-pull drive
capability when they are used as compare outputs of the CAPCOM unit.
As already mentioned, Port 1, 3, and 5 are provided for multiple alternate functions.
These functions are listed in Table 6-2:
User’s Manual
6-2
2001-05