C868_02 Datasheet, PDF (13/244 Pages) Infineon Technologies AG – 8 - Bit CMOS Microcontroller

C868
Introduction
1.3
Pin Definitions and Functions
This section describes all external signals of the C868 with its function.
Table 1-1 Pin Definitions and Functions
Symbol
P1.0–
P1.4
Pin Numbers I/O*) Function
P- P-
DSO- TSSOP-
28 38
12-8 6,4-1
I/O Port 1
is a 5-bit push-pull bidirectional I/O port. As
alternate digital functions, port 1 contains the
interrupt 3, timer 2 overflow flag, receive data input
and transmit data output of serial interface. The
alternate functions are assigned to the pins of port
1 as follows:
P3.0–
P3.7
12 6
11 4
10 3
9
2
8
1
2,3,23, 32,33,25, I/O
24,1, 26,31,24,
22,5,6 36,37
P1.0/TxD Transmit data of serial interface
P1.1/EXF2 Timer 2 overflow flag
P1.2
P1.3/INT3 Interrupt 3
P1.4/RxD Receive data of serial interface
Port 3
is an 8-bit push-pull bidirectional I/O port. This port
also serves as alternate functions for the CCU6
functions. The functions are assigned to the pins of
port 3 as follows :
2
32
3
33
23 25
24 26
1
31
22 24
5
36
6
37
V_AREF 19
15
V_AGND 18
14
*)I=Input
O=Output
P3.0/COUT63 16 bit compare channel output
P3.1/CTRAP CCU trap input
P3.2/COUT62 Output of capture/compare ch 2
P3.3/CC62 Input/output of capture/compare ch 2
P3.4/COUT61 Output of capture/compare ch 1
P3.5/CC61 Input/output of capture/compare ch 1
P3.6/COUT60 Output of capture/compare ch 0
P3.7/CC60 Input/output of capture/compare ch 0
– Reference voltage for the A/D converter.
– Reference ground for the A/D converter.
User’s Manual
1-5
V 0.4, 2002-01