C509-L_97 SIEMENS [Siemens Semiconductor Group], C509-L_97 Datasheet - Page 18
C509-L_97
Manufacturer Part Number
C509-L_97
Description
8-Bit CMOS Microcontroller
Manufacturer
SIEMENS [Siemens Semiconductor Group]
Datasheet
1.C509-L_97.pdf
(290 pages)
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Table 1-1
Pin Definitions and Functions (cont’d)
Symbol
RESET
V
V
P7.0 - P7.7
Semiconductor Group
*) I = Input
AREF
AGND
O = Output
73
78
79
87-80
Pin Number
I/O*)
I
–
–
I
Function
RESET
A low level on this pin for the duration of two machine
cycles while the oscillator is running resets the C509-L.
A small internal pullup resistor permits power-on reset
using only a capacitor connected to
Reference voltage for the A/D converter
Reference ground for the A/D converter
Port 7
Port 7 is an 8-bit unidirectional input port. Port pins can
be used for digital input if voltage levels meet the
specified input high/low voltages, and for the lower 8-bit
of the multiplexed analog inputs of the A/D converter
simultaneously.
P7.0 - P7.7
1-11
AIN0 - AIN7
Analog input 0 - 7
V
SS
.
Introduction
1997-10-01
C509-L
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