C517A_99 Datasheet, PDF (20/218 Pages) Siemens Semiconductor Group – 8-Bit CMOS Microcontroller

Introduction
C517A
Table 1-1
Pin Definitions and Functions (cont’d)
6\PERO
RESET
3LQ 1XPEHU
304)3 3/&&
73
10
V_AREF
V_AGND
P7.0 - P7.7
78
79
87 - 80
11
12
20-13
N.C.
2 - 5, 25,
–
28, 29,
51 - 53,
74 - 77
88, 89
*) I = Input
O = Output
,2  )XQFWLRQ
I
RESET
A low level on this pin for the duration of two
machine cycles while the oscillator is
running resets the C517A. A small internal
pullup resistor permits power-on reset using
only a capacitor connected to V_SS .
– Reference voltage for the A/D converter
– Reference ground for the A/D converter
I
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 AIN0 - AIN7 analog
input 0 - 7
– Not connected
These pins of the P-MQFP-100 package
must not be connected.
Semiconductor Group
1-14