900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf




Atmel Electronic Components Datasheet

89C51RD2 Datasheet

0 to 40MHz Flash Programmable 8-bit Microcontroller

No Preview Available !

T89C51RD2
0 to 40MHz Flash Programmable 8-bit Microcontroller
1. Description
ATMEL Wireless and Microcontrollers T89C51RD2 is
high performance CMOS Flash version of the 80C51
CMOS single chip 8-bit microcontroller. It contains a
64 Kbytes Flash memory block for program and for data.
The 64 Kbytes 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 T89C51RD2 retains all features of the ATMEL
Wireless and Microcontrollers 80C52 with 256 bytes of
www.DataShineteetr4nUa.lcoRmAM, a 7-source 4-level interrupt controller and
three timer/counters.
In addition, the T89C51RD2 has a Programmable
Counter Array, an XRAM of 1024 bytes, an EEPROM
of 2048 bytes, a Hardware Watchdog Timer, a more
versatile serial channel that facilitates multiprocessor
communication (EUART) and a speed improvement
mechanism (X2 mode). Pinout is either the standard 40/
44 pins of the C52 or an extended version with 6 ports
in a 64/68 pins package.
The fully static design of the T89C51RD2 allows to
reduce system power consumption by bringing the clock
frequency down to any value, even DC, without loss of
data.
The T89C51RD2 has 2 software-selectable modes of
reduced activity for further reduction in power
consumption. In the idle mode the CPU is frozen while
the peripherals and the interrupt system are still
operating. In the power-down mode the RAM is saved
and all other functions are inoperative.
The added features of the T89C51RD2 makes it more
powerful for applications that need pulse width
modulation, high speed I/O and counting capabilities
such as alarms, motor control, corded phones, smart card
readers.
2. Features
80C52 Compatible
8051 pin and instruction compatible
Four 8-bit I/O ports (or 6 in 64/68 pins packages)
Three 16-bit timer/counters
256 bytes scratch pad RAM
7 Interrupt sources with 4 priority levels
ISP (In System Programming) using standard VCC
power supply.
Boot FLASH contains low level FLASH
programming routines and a default serial loader
High-Speed Architecture
40 MHz in standard mode
20 MHz in X2 mode (6 clocks/machine cycle)
64K bytes on-chip Flash program / data Memory
Byte and page (128 bytes) erase and write
10k write cycles
On-chip 1024 bytes expanded RAM (XRAM)
Software selectable size (0, 256, 512, 768, 1024
bytes)
768 bytes selected at reset for T87C51RD2
compatibility
Dual Data Pointer
Variable length MOVX for slow RAM/peripherals
Improved X2 mode with independant selection for
CPU and each peripheral
2 k bytes EEPROM block for data storage
100K Write cycle
Programmable Counter Array with:
High Speed Output,
Compare / Capture,
Pulse Width Modulator,
Watchdog Timer Capabilities
Asynchronous port reset
Full duplex Enhanced UART
Low EMI (inhibit ALE)
Hardware Watchdog Timer (One-time enabled with
Reset-Out)
Power control modes:
Idle Mode.
Power-down mode.
Rev. F - 15 February, 2001
1


Atmel Electronic Components Datasheet

89C51RD2 Datasheet

0 to 40MHz Flash Programmable 8-bit Microcontroller

No Preview Available !

T89C51RD2
Power supply:
- M version: Commercial and industrial
4.5V to 5.5V : 40MHz X1 Mode, 20MHz X2 Mode
3V to 5.5V : 33MHz X1 Mode, 16 MHz X2 Mode
- L version: Commercial and industrial
2.7V to 3.6V : 25MHz X1 Mode, 12MHz X2 Mode
Temperature ranges: Commercial (0 to +70°C) and industrial (-40 to +85°C).
Packages: PDIL40, PLCC44, VQFP44, PLCC68, VQFP64
Table 1. Memory Size
PDIL40
PLCC44
VQFP44 1.4
T89C51RD2
www.DataSheet4U.com
Flash (bytes) EEPROM (bytes) XRAM (bytes)
TOTAL RAM
(bytes)
64k
2k
1024
1280
PLCC68
VQFP64 1.4
T89C51RD2
Flash (bytes)
64k
EEPROM
(bytes)
2k
XRAM (bytes)
1024
TOTAL RAM
(bytes)
1280
3. Block Diagram
I/O
32
I/O
48
XTAL1
XTAL2
ALE/ PROG
PSEN
EA
RD (3)
WR (3)
(3) (3)
(1) (1) (1) (1)
EUART
RAM
256x8
Flash
64Kx8
CPU
C51
CORE
IB-bus
XRAM EEPROM
1Kx8
2Kx8
PCA
Timer2
Timer 0
Timer 1
INT
Ctrl
(3) (3) (3) (3)
Parallel I/O Ports & Ext. Bus
Port
0
Port
1
Port
2
Port
3
Port
(2)
4
Port 5
(2)
Watch
Dog
(1): Alternate function of Port 1
(2): Only available on high pin count packages
(3): Alternate function of Port 3
2 Rev. F - 15 February, 2001


Part Number 89C51RD2
Description 0 to 40MHz Flash Programmable 8-bit Microcontroller
Maker ATMEL Corporation
PDF Download

89C51RD2 Datasheet PDF






Similar Datasheet

1 89C51RD2 80C51 8-bit Flash microcontroller family 16KB/32KB/64KB ISP/IAP Flash with 512B/512B/1KB RAM
NXP
2 89C51RD2 0 to 40MHz Flash Programmable 8-bit Microcontroller
ATMEL Corporation





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z



Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy