PCF84C85AT PHILIPS [NXP Semiconductors], PCF84C85AT Datasheet - Page 5

• Manufacturer Part Number: PCF84C85AT
• Description: Microcontroller with extended I/O
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
5
5.1
6
Of the standard quasi-bidirectional I/O ports, Port 2 is
incomplete, providing only line SDA/P2.3 that is shared
with the I
two derivative I/O ports are available:
Missing bits of incomplete ports, i.e. P2.0 to P2.2 and
DP1.7, are fixed at zero in the corresponding registers.
1996 Nov 21
handbook, halfpage
Derivative Port of 8 lines (DP0.0 to DP0.7)
Derivative Port of 7 lines (DP1.0 to DP1.6).
Microcontroller with extended I/O
PINNING INFORMATION
PARALLEL PORTS
Pinning
2
C-bus interface. In addition to the standard ports,
INT / T0
XTAL1
XTAL2
P0.0
P0.1
P0.2
P0.3
P0.4
P0.5
P0.6
P0.7
P1.0
P1.1
P1.2
P1.3
P1.4
P1.5
P1.6
P1.7
V SS
Fig.2 Pin configuration.
10
12
13
14
15
16
17
18
19
20
11
1
2
3
4
5
6
9
7
8
PCF84C85A
MLA597
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
SCLK
SDA / P2.3
DP1.6
DP1.5
DP1.4
DP1.3
DP1.2
DP1.1
DP1.0
DP0.7
DP0.6
DP0.5
DP0.4
DP0.3
DP0.2
DP0.1
DP0.0
V DD
T1
RESET
5
5.2
Table 1 DIP40 and VSO40 packages.
7
See “PCF84CXXXA family” data sheet for a complete
description of the instruction set.
INT/T0
P0.0 to P0.7
P1.0 to P1.7
XTAL1
XTAL2
V
RESET
DP0.0 to
DP0.7
DP1.0 to
DP1.6
SDA/P2.3
SCLK
T1
V
SS
DD
SYMBOL
INSTRUCTION SET
Pin description
10 to 17
22 to 29
30 to 36
2 to 9
PIN
18
19
20
21
37
38
39
40
1
TYPE
I/O
I/O
I/O
I/O
I/O
I/O
O
P
P
I
I
I
I
Interrupt/Test 0
8 bits of Port 0: 8-bit
quasi-bidirectional
I/O port
8 bits of Port 1: 8-bit
quasi-bidirectional
I/O port
XTAL input: crystal
oscillator/external
clock input
XTAL output: crystal
oscillator output
ground
Reset input
Derivative Port 0:
quasi-bidirectional
I/O port (8-bit)
Derivative Port 1:
quasi-bidirectional
I/O lines (7-bit)
bidirectional data line
of the I
interface; or Port 2
quasi-bidirectional
I/O port (1 bit only)
bidirectional clock
line of the I
interface
Test 1: count input of
8-bit timer/event
counter 1
positive supply
PCF84C85A
Product specification
DESCRIPTION
2
C-bus
2
C-bus