PCF84C00B Philips Semiconductors, PCF84C00B Datasheet - Page 5

• Manufacturer Part Number: PCF84C00B
• Description: 8-bit microcontroller with I2C-bus interface
• Manufacturer: Philips Semiconductors

Philips Semiconductors
5
Table 1 PCF84C00B (see Fig.4)
1996 Nov 25
P2.2
SDA/P2.3
SCLK
P0.0 to P0.7
INT/T0
T1
V
XTAL1
XTAL2
RESET
P1.0 to P1.7
P2.0 to P2.1
V
SS
DD
8-bit microcontroller with I
Fig.2
SYMBOL
PINNING
PSEN
Replacement of dotted section in Fig.1, for
the PCF84C00B ‘piggy-back’ version.
A0-A12
18 to 25
4 to 11
26, 27
PIN
12
13
14
15
16
17
28
1
2
3
13
D0-D7
TYPE
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
P
P
I
I
I
1 bit of Port 2: 4-bit quasi-bidirectional I/O port
bidirectional data line of the I
quasi-bidirectional I/O line
bidirectional clock line of the I
8 bits of Port 0: 8-bit quasi-bidirectional I/O port
Interrupt/Test 0: external interrupt input (negative edge triggered)/test input
pin. When used as a test input, this pin is directly tested by conditional branch
instructions JT0 and JNT0.
Test 1: test input pin, directly tested by conditional branch instructions JT1 and
JNT1. T1 may also be selected as an input to the 8-bit timer/event counter via
the STRT CNT instruction.
ground: circuit earth potential
oscillator input: input from a crystal which determines the internal oscillator
frequency or an external clock generator
oscillator output: output of the inverting amplifier
reset input: used to initialize the microcontroller (active HIGH); also output of
power-on-reset circuit
8 bits of Port 1: 8-bit quasi-bidirectional I/O port
2 bits of Port 2: 4-bit quasi-bidirectional I/O port
power supply: 2.5 V to 5.5 V
2
C-bus interface
MGG402
8
5
k, full pagewidth
Fig.3
DXALE
DXWR
DXRD
PSEN
EXDI
2
2
C-bus interface; or 1 bit of Port 2: 4-bit
C-bus interface
DESCRIPTION
Replacement of dotted section in Fig.1, for
the PCF84C00T ROM-less version.
A0-A12
13
D0-D7
Product specification
PCF84C00
8