參數(shù)資料
型號(hào)： PCF84C21A
廠商： NXP Semiconductors N.V.
英文描述： Telecom microcontrollers
中文描述： 電信微控制器
文件頁(yè)數(shù)： 5/20頁(yè)
文件大?。?/td> 161K
代理商： PCF84C21A
1996 Nov 20
5
Philips Semiconductors
Product specification
Telecom microcontrollers
PCF84C21A; PCF84C41A;
PCF84C81A
5
PINNING INFORMATION
5.1
Pinning
Fig.2 Pin configuration.
1
2
3
4
5
6
7
8
9
10
11
12
13
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
PCF84C21A
PCF84C41A
PCF84C81A
P2.2
SDA/P2.3
SCLK
P0.0
P0.1
P0.2
P0.3
P0.4
P0.5
P0.6
P0.7
T1
VSS
INT/T0
VDD
P2.1
P2.0
P1.7
P1.6
P1.5
P1.4
P1.3
P1.2
P1.1
P1.0
RESET
XTAL2
XTAL1
MBB562
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
bidirectional data line of the
I
2
C-bus interface, or 1 bit of
Port 2: 4-bit quasi-bidirectional
I/O port
bidirectional clock line of the
I
2
C-bus interface
8 bits of Port 0: 8-bit
quasi-bidirectional I/O port
Interrupt/Test 0
Test 1/count input of 8-bit
timer/event counter 1
ground
crystal oscillator input or
external clock input
crystal oscillator output
Reset input
SDA/P2.3
2
SCLK
3
P0.0 to P0.7 4 to 11
INT/T0
T1
12
13
V
SS
XTAL1
14
15
XTAL2
RESET
P1.0 to P1.7 18 to 25 8 bits of Port 1: 8-bit
16
17
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
positive supply
V
DD
28
6
INSTRUCTION SET
ROM is restricted to 2 kbytes for the PCF84C21A and
4 kbytes for the PCF84C41A. Therefore, the instructions
SEL MB1/2/3 for the PCF84C21A, and the instructions
SEL MB2/3 for the PCF84C41A should be avoided, as
they would define non-existing program memory banks.
As RAM is limited to 64 bytes for the PCF84C21A and to
128 bytes for the PCF84C41A, care should be taken to
avoid accesses to non-existing RAM locations.
See the “PCF84CxxxA family” data sheet for a complete
description of the instruction set.
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 I
SS
.
相關(guān)PDF資料
PDF描述
PCF84C41A Telecom microcontrollers
PCF85103C-2P 256 x 8-bit CMOS EEPROMs with I2C-bus interface
PCF85102C-2 RESN CER CHIP 8.000MHZ0.5% -40 - 85C
PCF85102C-2P 256 x 8-bit CMOS EEPROMs with I2C-bus interface
PCF85103C-2 256 x 8-bit CMOS EEPROM with I2C-bus interface
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PCF84C21AP 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Telecom microcontrollers
PCF84C21AT 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Telecom microcontrollers
PCF84C21PN 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller
PCF84C21TD 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller
PCF84C22A 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:8-bit microcontrollers
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