
1998 Aug 26
8
Philips Semiconductors
Product specification
Low voltage 8-bit microcontroller with
6-kbyte embedded RAM
SZF2002
I/O Ports
P1.0/INT2/T2
P1.1/INT3/T2EX
P1.2/INT4
P1.3/INT5
P1.4/INT6
P1.5/INT7
P1.6/INT8/SCL
P1.7/SDA
P3.0/RXD
P3.1/TXD
P3.2/INT0
P3.3/INT1
P3.4/T0
P3.5/T1
P3.6
P3.7
P4.0/RAMCE
P4.1
P4.2
P4.3
P4.4
P4.5
P4.6
P4.7
29
28
27
26
25
24
23
22
19
18
17
16
15
14
13
12
49
48
47
46
45
44
43
42
Port 1
(
P1.0 to P1.7).
8-bit bidirectional I/O port with internal pull-ups;
INT2 to INT8
:
external interrupt inputs;
T2:
Timer T2 I/O;
T2EX:
Timer 2 external input;
SCL:
I
2
C-bus interface clock;
SDA:
I
2
C-bus interface data.
Port 1 pins that have logic 1s written to them are pulled HIGH by the internal pull-ups,
and in that state can be used as inputs (note P1.6 and P1.7 are open-drain only).
As inputs, Port 1 pins that are externally pulled LOW will source current
(I
IL
, see Chapter 25) due to the internal pull-ups.
Port 3 (P3.0 to P3.7).
8-bit bidirectional I/O port with internal pull-ups;
RXD:
serial
port receiver data input (asynchronous);
TXD:
serial port transmitter data output
(asynchronous);
INT0:
external interrupt 0;
INT1:
external interrupt 1;
T0
: Timer 0 external input;
T1:
Timer 1 external input.
Port 3 pins that have logic 1s written to them are pulled HIGH by the internal pull-ups,
and in that state can be used as inputs. As inputs, Port 3 pins that are externally pulled
LOW will source current (I
IL
, see Chapter 25) due to the internal pull-ups.
Port 4 (P4.0 to P4.7).
8-bit bidirectional I/O port;
RAMCE
chip enable for external
RAM.
Port 4 pins that have logic 1s written to them are pulled HIGH by the internal pull-ups,
and in that state can be used as inputs. As inputs, Port 4 pins that are externally pulled
LOW will source current (I
IL
, see Chapter 25) due to the internal pull-ups.
ADC interface
ADC0
ADC1
ADC2
ADC3
ADC4
ADC5
37
36
35
34
33
32
Input channels to the ADC.
SYMBOL
PIN
DESCRIPTION