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Pin Definitions and Functions
Symbol
Pin
P-LCC-68
P4.0-P4.7 1-3, 5-9
PE
4
RESET
10
11
V
AREF
12
V
AGND
P6.7-P6.0 13-20
Semiconductor Group
Pin
Input (I)
P-MQFP-80
Output (O)
72-74,
I/O
76-80
75
I
1
I
3
4
5-12
Function
Port 4
is an 8-bit bidirectional I/O port with
internal pullup resistors. Port 4 pins that
have 1's written to them are pulled high by
the internal pullup resistors, and in that
state can be used as inputs. As inputs,
port 4 pins being externally pulled low will
source current (I
characteristics) because of the internal
pullup resistors.
Power saving mode enable
A low level on this pin enables the use of
the power saving modes (idle mode and
power-down mode). When PE is held on
high level it is impossible to enter the
power saving modes.
*
Reset pin
A low level on this pin for the duration of
two machine cycles while the oscillator is
running resets the SAB 80C515. 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
Port 6
is an 8-bit undirectional input port. Port
pins can be used for digital input if voltage
levels simultaneously meet the
specifications for high/low input voltages
and for the eight multiplexed analog inputs
of the A/D converter.
220
Device Specifications
in the DC
I L
,
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