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Número de pieza | PCF84C81 | |
Descripción | Telecom microcontrollers | |
Fabricantes | NXP Semiconductors | |
Logotipo | ||
Hay una vista previa y un enlace de descarga de PCF84C81 (archivo pdf) en la parte inferior de esta página. Total 20 Páginas | ||
No Preview Available ! INTEGRATED CIRCUITS
DATA SHEET
PCF84C81A
Telecom microcontroller
Product specification
Supersedes data of 1996 Nov 20
File under Integrated Circuits, IC14
1998 Apr 20
1 page Philips Semiconductors
Telecom microcontroller
Product specification
PCF84C81A
5 PINNING INFORMATION
5.1 Pinning
handbook, halfpage
P2.2 1
28 VDD
SDA/P2.3 2
27 P2.1
SCLK 3
26 P2.0
P0.0 4
25 P1.7
P0.1 5
24 P1.6
P0.2 6
23 P1.5
P0.3 7
22 P1.4
PCF84C81A
P0.4 8
21 P1.3
P0.5 9
20 P1.2
P0.6 10
19 P1.1
P0.7 11
18 P1.0
INT/T0 12
17 RESET
T1 13
VSS 14
16 XTAL2
15 XTAL1
MBB562
Fig.2 Pin configuration.
6 INSTRUCTION SET
See the “PCF84CxxxA family” data sheet for a complete
description of the instruction set.
5.2 Pin description
Table 1 DIP28 and SO28 packages
SYMBOL PIN
FUNCTION
P2.2
1 1 bit of Port 2: 4-bit
quasi-bidirectional I/O port
SDA/P2.3 2
bidirectional data line of the
I2C-bus interface, or 1 bit of
Port 2: 4-bit quasi-bidirectional
I/O port
SCLK 3 bidirectional clock line of the
I2C-bus interface
P0.0 to P0.7 4 to 11 8 bits of Port 0: 8-bit
quasi-bidirectional I/O port
INT/T0 12 Interrupt/Test 0
T1 13 Test 1/count input of 8-bit
timer/event counter 1
VSS 14 ground
XTAL1 15 crystal oscillator input or
external clock input
XTAL2 16 crystal oscillator output
RESET
17
Reset input
P1.0 to P1.7 18 to 25 8 bits of Port 1: 8-bit
quasi-bidirectional I/O port
P2.0 to P2.1 26 to 27 2 bits of Port 2: 4-bit
quasi-bidirectional I/O port
VDD 28 positive supply
7 HIGH SINK OUTPUT CURRENTS
The Port 1 outputs of these devices are designed for high
current drive in the logic 0 state. They are capable of
driving 10 mA loads and higher. Applications include drive
for small relays and light-emitting diodes (LEDs).
To avoid overload, care should be taken that the total
Port 1 current averages less than 80 mA, i.e. an average
of 10 mA per Port 1 line. Refer to Chapter “Limiting values”
which specifies an upper limit of 100 mA for ISS.
1998 Apr 20
5
5 Page Philips Semiconductors
Telecom microcontroller
Product specification
PCF84C81A
12 AC CHARACTERISTICS
VDD = 2.5 to 5.5 V; VSS = 0 V; Tamb = −40 to +85 °C; all voltages with respect to VSS; unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP. MAX. UNIT
tr
rise time all outputs
VDD = 5 V; Tamb = 25 °C; CL = 50 pF −
30 −
ns
tf
fall time all outputs
VDD = 5 V; Tamb = 25 °C; CL = 50 pF −
30 −
ns
fxtal clock frequency
see Fig.3
1 − 16 MHz
Table 2 I2C-bus timing (see Figs 15 and 16)
SYMBOL
PARAMETER
INPUT
(see Fig.14)
OUTPUT
(see Fig.15; note 1)
SCLK
tHD;STA
tLOW
tHIGH
tRC
tFC
SDA
tBUF
tSU;DAT
tHD;DAT
tRD
tFD
tSU;STO
START condition hold time
SCLK LOW time
SCLK HIGH time
SCLK rise time
SCLK fall time
bus free time
data set-up time
data hold time
SDA/P2.3 rise time
SDA/P2.3 fall time
STOP condition set-up time
≥ f--1x---t4-a--l
≥ -f-1x---t7-a--l
≥ f--1x---t7-a--l
≤1 µs
≤0.3 µs
≥ f--1x---t4-a--l
≥ 250 ns
≥0
≤1 µs
≤0.3 µs
≥ f--1x---t4-a--l
2-D----×F-----f-+-x--t--9a-l
-2D----×-F----f-–-x--t-3-a-l ; note 2
2-D----×F-----f-+-x--t--3a-l ; note 2
≤1 µs; note 3
≤0.1 µs; note 4
≥ 4.7 µs; note 5
≥ f--1x---t5-a--l ; note 6
≥ f--x-9--t-a--l
≤1 µs; note 3
≤0.1 µs; note 4
2-D----×-F----f-–-x--t-3-a-l
Notes
1. DF stands for Division Factor: the divisor of fxtal (see the “PCF84CxxxA family” data sheet).
2. Values given for ASC = 0; for ASC = 1: tHIGH = -3----(-4--D---×--F--f--x-+--t-a--1l---)-- ; tLOW = 4-D----×-F----f-–-x--t-3-a-l
3. Determined by I2C-bus capacitance (Cb) and external pull-up resistor.
4. At maximum allowed I2C-bus capacitance Cb = 400 pF.
5. Determined by program.
6. If tLOW < f--2x---t4-a--l , tSU:DAT ≥ t--L---O--f-W-x--t-a--–-l----9- , independent of ASC.
1998 Apr 20
11
11 Page |
Páginas | Total 20 Páginas | |
PDF Descargar | [ Datasheet PCF84C81.PDF ] |
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