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AT89C51RC-24PI 8-BIT MICROCONTROLLER WITH 16K/32K BYTES FLASH

Código: ---------IMI0062

AT89C51RC-24PI 8-BIT MICROCONTROLLER WITH 16K/32K BYTES FLASH
ATMEL

Categoría de producto: Microcontroladores (MCU)
RoHS: No
Ancho de bus de datos: 8 bit
Frecuencia de reloj máxima: 33 MHz
Tamaño de memoria del programa: 32 KB
Tamaño de RAM de datos: 512 B
Número de entradas / salidas programables: 32
Número de temporizadores: 3 bit
Voltaje de alimentación operativo: 4 V to 5.5 V
Paquete / Cubierta: PDIP-40
Estilo de montaje: Through Hole
Altura: 4.83 mm
Tipo de interfaz: UART
Longitud: 52.58 mm
Temperatura de trabajo máxima: + 85 C
Temperatura de trabajo mínima: - 40 C
Tipo de memoria de programa: Flash
Cantidad de Paquete Estándar: 10
Voltaje de alimentación (máx.): 5.5 V
Voltaje de alimentación (mín.): 4 V
Ancho: 13.97 mm

Marca:ATMEL

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Rev. 4180B–8051–04/03
Features
• 80C52 Compatible
– 8051 Pin and Instruction Compatible
– Four 8-bit I/O Ports
– Three 16-bit Timer/Counters
– 256 Bytes Scratch Pad RAM
– 9 Interrupt Sources with 4 Priority Levels
– Dual Data Pointer
• Variable Length MOVX for Slow RAM/Peripherals
• ISP (In-system Programming) Using Standard VCC Power Supply
• Boot ROM Contains Low Level Flash Programming Routines and a Default Serial
Loader
• High-speed Architecture
– 48 MHz in Standard Mode and Internal Code Execution (40 MHz for external code)
– 24 MHz in X2 Mode and internal code execution (20 MHz for external code)
– 16K/32K Bytes On-chip Flash Program/Data Memory
– Byte and Page (128 Bytes) Erase and Write
– 100K Write Cycles
• On-chip 1024 Bytes Expanded RAM (XRAM)
– Software Selectable Size (0, 256, 512, 768, 1024 Bytes)
– 256 Bytes Selected at Reset for TS87C51RB2/RC2 Compatibility
• Keyboard Interrupt Interface on Port P1
• SPI Interface (Master/Slave Mode)
• 8-bit Clock Prescaler
• Improved X2 Mode with Independent Selection for CPU and Each Peripheral
• Programmable Counter Array 5 Channels
– High-speed Output
– Compare/Capture
– Pulse Width Modulator
– Watchdog Timer Capabilities
• Asynchronous Port Reset
• Full Duplex Enhanced UART
• Dedicated Baud Rate Generator for UART
• Low EMI (Inhibit ALE)
• Hardware Watchdog Timer (One-time Enabled with Reset-out)
• Power Control Modes
– Idle Mode
– Power-down Mode
– Power-off Flag
• Power Supply:
– 2.7 to 3.6 (3V Version)
– 2.7 to 5.5V (5V Version)
• Temperature Ranges: Commercial (0 to +70°C) and Industrial (-40°C to +85°C)
• Packages: PDIL40, PLCC44, VQFP44
Description
The AT89C51RB2/RC2 is a high-performance Flash version of the 80C51 8-bit microcontrollers.
It contains a 16K or 32K Bytes Flash memory block for program and data.
The Flash memory can be programmed either in parallel mode or in serial mode with
the ISP capability or with software. The programming voltage is internally generated
from the standard VCC pin.
The AT89C51RB2/RC2 retains all features of the 80C52 with 256 Bytes of internal
RAM, a 9-source 4-level interrupt controller and three timer/counters.
8-bit
Microcontroller
with 16K/
32K Bytes Flash
AT89C51RB2
AT89C51RC2In addition, the AT89C51RB2/RC2 has a Programmable Counter Array, an XRAM of
1024 Bytes, a Hardware Watchdog Timer, a Keyboard Interface, an SPI Interface, a
more versatile serial channel that facilitates multiprocessor communication (EUART)
and a speed improvement mechanism (X2 mode).
The Pinout is the standard 40/44 pins of the C52.
The fully static design reduces system power consumption of the AT89C51RB2/RC2 by
allowing it to bring the clock frequency down to any value, even DC, without loss of data.
The AT89C51RB2/RC2 has 2 software-selectable modes of reduced activity and 8-bit
clock prescaler for further reduction in power consumption. In Idle mode, the CPU is frozen
while the peripherals and the interrupt system are still operating. In power-down
mode, the RAM is saved and all other functions are inoperative.
The added features of the AT89C51RB2/RC2 make it more powerful for applications
that need pulse width modulation, high speed I/O and counting capabilities such as
alarms, motor control, corded phones, and smart card readers.
Block Diagram
Figure 1. Block Diagram
Notes: 1. Alternate function of Port 1.
2. Alternate function of Port 3.
Table 1. Memory Size
Part Number Flash (Bytes) XRAM (Bytes)
TOTAL RAM
(Bytes) I/O
AT89C51RB2 16K 1024 1280 32
AT89C51RC2 32K 1024 1280 32
Timer 0 INT
RAM
256x8
T0
T1
RxD
TxD
WR
RD
EA
PSEN
ALE/
XTAL2
XTAL1
EUART
CPU
Timer 1
INT1
Ctrl INT0
(2)
(2)
C51
CORE
(2) (2) (2) (2)
Port 0
P0
Port 1 Port 2 Port 3
Parallel I/O Ports & Ext. Bus
P1
P2
P3
XRAM
1Kx8
IB-bus
PCA
RESET
PROG
Watch
Dog
PCA
ECI
Vss
VCC
(2) (2) (1) (1)
Timer2
T2EX
T2
(1) (1)
Flash
32Kx8 or
16Kx8
Key
Board
ROM
2Kx8
Boot
+
BRG
SPI
MISO
MOSI
SCK
(1) (1) (1)
SS
(1)
3
AT89C51RB2/RC2
4180B–8051–04/03
SFR Mapping The Special Function Registers (SFRs) of the AT89C51RB2/RC2 fall into the following
categories:
• C51 core registers: ACC, B, DPH, DPL, PSW, SP
• I/O port registers: P0, P1, P2, P3
• Timer registers: T2CON, T2MOD, TCON, TH0, TH1, TH2, TMOD, TL0, TL1, TL2,
RCAP2L, RCAP2H
• Serial I/O port registers: SADDR, SADEN, SBUF, SCON
• PCA (Programmable Counter Array) registers: CCON, CCAPMx, CL, CH, CCAPxH,
CCAPxL (x: 0 to 4)
• Power and clock control registers: PCON
• Hardware Watchdog Timer registers: WDTRST, WDTPRG
• Interrupt system registers: IEN0, IPL0, IPH0, IEN1, IPL1, IPH1
• Keyboard Interface registers: KBE, KBF, KBLS
• SPI registers: SPCON, SPSTR, SPDAT
• BRG (Baud Rate Generator) registers: BRL, BDRCON
• Flash register: FCON
• Clock Prescaler register: CKRL
• Others: AUXR, AUXR1, CKCON0, CKCON1

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IVA no incluido en los precios. | Última Actualización: 11/04/2014 10:50

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