P83C528IFA Ver la hoja de datos (PDF) - Philips Electronics
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P83C528IFA Datasheet PDF : 76 Pages
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Philips Semiconductors
8-bit microcontrollers
Product specification
P83C524; P80C528; P83C528
7.2 Pin description
Table 1 Pin description for P83C524, P80C528 and P83C528; see note 1
PIN
SYMBOL
SOT 129-1 SOT 187-2 SOT 307-2
DESCRIPTION
P1.0−P1.7 1 to 8
2−9
(1 n.c.)
1−3,
40−44
(39 n.c.)
Port 1: 8-bit quasi-bidirectional I/O Port. Port 1 can sink/source
one TTL (= 4 LSTTL) input. It can drive CMOS inputs without
external pull-ups, except P1.6 and P1.7 which have open drain
outputs.
Port 1 alternative functions:
T2
1
2
40
P1.0 Timer/event counter 2 external event counter input
(falling edge triggered)
T2EX
2
3
41
P1.1 Timer/event counter 2 capture/reload trigger or external
interrupt 2 input (falling edge triggered)
SCL
7
8
2
P1.6 I2C-bus Serial Port clock line
SDA
8
9
3
P1.7 I2C-bus Serial Port data line.
RST
9
10
4
RESET: a HIGH level on this pin for two machine cycles while the
oscillator is running, resets the device. An internal pull-down
resistor permits power-on reset using only a capacitor connected
to VDD. After a WDT overflow this pin is pulled HIGH while the
internal reset signal is active.
P3.0−P3.7 10−17
11, 13−19 5, 7−13 Port 3: 8-bit quasi-bidirectional I/O Port with internal pull-ups.
RXD/data 10
TXD/clock 11
INT0
12
INT1
13
T0
14
T1
15
WR
16
RD
17
XTAL2 18
(12 n.c.) (6 n.c.)
11
5
13
7
14
8
15
9
16
10
17
11
18
12
19
13
20
14
Port 3 can sink/source one TTL (= 4 LSTTL) input. It can drive
CMOS inputs without external pull-ups.
Port 3 alternative functions:
P3.0
Serial Port data input (asynchronous) or data
input/output (synchronous)
P3.1
Serial Port data output (asynchronous) or clock output
(synchronous)
P3.2
external interrupt 0 or gate control input for timer/event
counter 0
P3.3
external interrupt 1 or gate control input for timer/event
counter 1
P3.4 external input for timer/event counter 0
P3.5 external input for timer/event counter 1
P3.6 external data memory write strobe
P3.7 external data memory read strobe.
The generation or use of a Port 3 pin as an alternative function is
carried out automatically by the P83C528 provided the associated
Special Function Register (SFR) bit is set HIGH.
Crystal input 2: output of the inverting amplifier that forms the
oscillator. This pin left open-circuit when an external oscillator
clock is used (see Figures 22 and 23).
1997 Dec 15
11
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