SAB80C515A-M18-T3 Siemens Semiconductor Group, SAB80C515A-M18-T3 Datasheet - Page 8
SAB80C515A-M18-T3
Manufacturer Part Number
SAB80C515A-M18-T3
Description
8-Bit CMOS Single-Chip Microcontroller
Manufacturer
Siemens Semiconductor Group
Datasheet
1.SAB80C515A-M18-T3.pdf
(57 pages)
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Pin Definitions and Functions (cont’d)
Symbol
P6.7-P6.0 13-20
P3.0-P3.7 21-28
Semiconductor Group
Pin
P-LCC-68
Pin
P-MQFP-80
5-12
15-22
Input (I)
Output (O)
I
I/O
7
Function
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.
Port 3
is an 8-bit bidirectional I/O port with internal
pullup resistors. Port 3 pins that have1's
written to them are pulled high by the internal
pullup resistors, and in that state can be used
as inputs. As inputs, port 3 pins being
externally pulled low will source current ( I
the DC characteristics) because of the internal
pullup resistors. Port 3 also contains the
interrupt, timer, serial port and external
memory strobe pins that are used by various
options. The output latch corresponding to a
secondary function must be programmed to a
one (1) for that function to operate. The
secondary functions are assigned to the pins
of port 3, as follows:
– R D (P3.0): serial port’s receiver data
– T D (P3.1): serial port’s transmitter data
– INT0(P3.2):
– INT1(P3.3):
– T0 (P3.4):
– T1 (P3.5):
– WR(P3.6):
– RD(P3.7):
SAB 80C515A/83C515A-5
input (asynchronous) or data
input/output (synchronous)
output (asynchronous) or
clock output (synchronous)
interrupt 0 input/timer 0 gate
control input
interrupt 1 input/timer 1 gate
control input
counter 0 input
counter 1 input
the write control signal
latches the data byte from
port 0 into the external data
memory
the read control signal
enables the external data
memory to port 0
IL
, in
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