Datasheet

C515C
Data Sheet 6 2003-02
Table 2 Pin Definitions and Functions
Symbol Pin Number I/O
1)
Function
P-MQFP-80-1
RESET
1IRESET
A low level on this pin for the duration of two
machine cycles while the oscillator is running resets
the C515C. A small internal pullup resistor permits
power-on reset using only a capacitor connected to
V
SS
.
V
AREF
3–Reference voltage for the A/D converter
V
AGND
4–Reference ground for the A/D converter
P6.0-P6.7 12-5 I Port 6
is an 8-bit unidirectional input port to the
A/D converter. Port pins can be used for digital
input, if voltage levels simultaneously meet the
specifications high/low input voltages and for the
eight multiplexed analog inputs.
P7.0 / INT7
23 I/O Port 7
is an 1-bit quasi-bidirectional I/O port with internal
pull-up resistor. When a 1 is written to P7.0 it is
pulled high by an internal pull-up resistor, and in that
state can be used as input. As input, P7.0 being
externally pulled low will source current (
I
IL
, in the
DC characteristics) because of the internal pull-up
resistor. If P7.0 is used as interrupt input, its output
latch must be programmed to a one (1). The
secondary function is assigned to the port 7 pin as
follows:
P7.0 INT7
, Interrupt 7 input