C508 datasheet(10/93 Pages) INFINEON

10 / 93 page

C508

Data Sheet

2000-08

Table 1

Pin Defintions and Functions

Sym-

bol

Pin Numbers

I/O1) Function

P-MQFP-64 P-SDIP-64

P1.0-

P1.7

25 - 32

33 - 40

I/O

Port 1

is an 8-bit quasi-bidirectional port with internal

pull-up transistors. Port 1 pins can be used for

digital input/output. Port 1 pins that have “1”s

written to them are pulled high by the internal

pull-up transistors and in that state can be used

as inputs. As inputs, Port 1 pins being

externally pulled low will source current (

IIL, in

the DC characteristics) because of the internal

pullup transistors. The output latch

corresponding secondary function must be

programmed to a one (1) for that function to

operate. As secondary functions, Port 1

contains the capture/compare inputs/outputs

as well as the CCU trap input.

Port 1 pins have LED drive capability of up to

10 mA sinking current per pin.

The secondary functions from the CCU unit are

assigned to the pins of Port 1 as follows:

P1.0/COUT3 10-bit compare channel output

P1.1/CTRAP CCU trap input

P1.2/CC0

Input/Output of capture/

compare channel 0

P1.3/COUT0 Output of capture/compare

channel 0

P1.4/CC1

Input/Output of capture/

compare channel 1

P1.5/COUT1 Output of capture/compare

channel 1

P1.6/CC2

Input/Output of capture/

compare channel 2

P1.7/COUT2 Output of capture/compare

channel 2

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