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PDF P83CL781HFP Data sheet ( Hoja de datos )
| Número de pieza | P83CL781HFP | |
| Descripción | Low voltage 8-bit microcontrollers with UART and I2C-bus | |
| Fabricantes | NXP Semiconductors | |
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INTEGRATED CIRCUITS
DATA SHEET
P83CL781; P83CL782
Low voltage 8-bit microcontrollers
with UART and I2C-bus
Product specification
Supersedes data of 1995 Jul 13
File under Integrated Circuits, IC20
1997 Mar 14
1 page  
Philips Semiconductors
Low voltage 8-bit microcontrollers with
UART and I2C-bus
5 BLOCK DIAGRAM
Product specification
P83CL781; P83CL782
handbook, full pagewidth
XTAL1
XTAL2
EA
ALE
PSEN
WR
3
RD
3
RST
AD0 to 7
0
A8 to 15
2
T0 T1 INT0 INT1
3 333
MLA601
TWO
16-BIT
TIMER/
EVENT
COUNTERS
(T0, T1)
CPU
80C51
core
excluding
ROM/RAM
PROGRAM
MEMORY
16 kbyte
ROM
DATA
MEMORY
256 byte
RAM
VDD
8-bit internal bus
P83CL781
P83CL782
PARALLEL
I/O PORTS
AND
EXTERNAL
BUS
SERIAL
UART
PORT
16-BIT
TIMER/
EVENT
COUNTER
I2C
INTERFACE
VSS
33
P0 P1 P2 P3 TXD RXD
11
T2 T2EX
11
SCL SDA
0 alternative function of Port 0
1 alternative functions of Port 1
2 alternative function of Port 2
3 alternative function of Port 3
Fig.1 Block diagram.
1997 Mar 14
5
5 Page 
Philips Semiconductors
Low voltage 8-bit microcontrollers with
UART and I2C-bus
Product specification
P83CL781; P83CL782
8 FUNCTIONAL DESCRIPTION OVERVIEW
This chapter gives a brief overview of the device. The
detailed functional description is in the following chapters:
Chapter 9 “Memory organization”
Chapter 10 “I/O facilities”
Chapter 11 “Timer/event counters”
Chapter 12 “Reduced power modes”
Chapter 13 “I2C-bus serial I/O”
Chapter 14 “Standard serial interface SIO0: UART”
Chapter 15 “Interrupt system”
Chapter 16 “Oscillator circuitry”
Chapter 17 “Reset”.
8.1 General
The P83CL78x is a stand-alone high-performance CMOS
microcontroller designed for use in real-time applications
such as instrumentation, industrial control, intelligent
computer peripherals and consumer products. The device
provides hardware features, architectural enhancements
and new instructions to function as a controller for
applications requiring up to 64 kbytes of Program Memory
and/or up to 64 kbytes of data storage.
The P83CL78x contains a non-volatile 16 kbyte read-only
Program Memory; a static 256 byte read/write Data
Memory; 32 I/O lines; three 16-bit timer/event counters; a
fifteen-source, two priority-level, nested interrupt structure
and on-chip oscillator and timing circuit.
The device has two software-selectable modes of reduced
activity for power reduction:
• Idle mode; freezes the CPU while allowing the timers,
serial I/O and interrupt system to continue functioning.
• Power-down mode; saves the RAM contents but
freezes the oscillator causing all other chip functions to
be inoperative.
In addition, two serial interfaces are provided on-chip:
• a standard UART serial interface, and
• a standard I2C-bus serial interface. The I2C-bus serial
interface has byte-oriented master and slave functions
allowing communication with the whole family of I2C-bus
compatible devices.
8.2 CPU timing
A machine cycle consists of a sequence of 6 states. Each
state lasts for two oscillator periods, thus a machine cycle
takes 12 oscillator periods or 1 µs if the oscillator
frequency (fosc) is 12 MHz.
1997 Mar 14
11
11 Page | ||
| Páginas | Total 70 Páginas | |
| PDF Descargar | [ Datasheet P83CL781HFP.PDF ] | |
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