C504 Datasheet, PDF (7/49 Pages) Siemens Semiconductor Group – 8-Bit CMOS Microcontroller

C504
Table 1
Pin Definitions and Functions
Symbol
P1.0-P1.7
Pin Number I/O
(P-MQFP-44) *)
40-44,
I/O
1-3
40
41
42
43
44
1
2
3
RESET
4
I
*) I = Input
O = Output
Function
Port 1
is an 8-bit bidirectional port. Port pins can be used for
digital input/output. P1.0 - P1.3 can also be used as analog
inputs of the A/D-converter. As secondary digital functions,
port 1 contains the timer 2 pins and the capture/compare
inputs/outputs. Port 1 pins are assigned to be used as
analog inputs via the register P1ANA.
The functions are assigned to the pins of port 1 as follows:
P1.0 / AN0 / T2
Analog input channel 0 /
input to counter 2
P1.1 / AN1 / T2EX Analog input channel 1 /
capture/reload trigger of timer 2 /
up-down count
P1.2 / AN2 / CC0 Analog input channel 2 /
input/output of capture/compare
channel 0
P1.3 / AN3 / COUT0 Analog input channel 3 /
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
RESET
A high level on this pin for one machine cycle while the
oscillator is running resets the device. An internal diffused
resistor to V_SS permits power-on reset using only an
external capacitor to V_CC.
Semiconductor Group
7