AT89C55WD-24PI

Processor Series :
Operating Temperature Range :
Data Bus Width : 8 bit
Core : 8051
Data RAM Size : 256 B
Package / Case : PDIP-40
Mounting Style : Through Hole
On-Chip ADC : No
Operating Supply Voltage : 4 V to 5.5 V
Maximum Clock Frequency : 33 MHz
Program Memory Size : 20 KB


Description

The AT89C55WD-24PI is one member of the AT89C55WD series.The AT89C55WD is a low-power, high-performance CMOS 8-bit microcontroller with 20K bytes of Flash programmable read only memory and 256 bytes of RAM. The device is manufactured using Atmel's high-density nonvolatile memory technology and is compatible with the industry standard 80C51 and 80C52 instruction set and pinout. The on-chip Flash allows the program memory to be user programmed by a conventional nonvolatile memory programmer.

Features of the AT89C55WD-24PI are:(1)compatible with MCS-51 products; (2)20K bytes of reprogrammable flash memory; (3)endurance: 1000 write/erase cycles; (4)4V to 5.5V operating range; (5)fully static operation: 0 Hz to 33 MHz; (6)three-level program memory lock; (7)256 x 8-bit internal RAM; (8)32 programmable I/O lines; (9)three 16-bit timer/counters; (10)eight interrupt sources; (11)programmable serial channel; (12)low-power idle and power-down modes; (13)interrupt recovery from power-down mode; (14)hardware watchdog timer; (15)dual data pointer; (16)power-off flag.

The absolute maximum ratings of the AT89C55WD-24PI can be summarized as:(1)maximum operating voltage:6.6V;(2)storage temperature:-65 to +150;(3)operating temperature:-50 to 125;(4)voltage on any pin with respect to ground:1.0V to 7.0V;(5)DC output:15.0 mA.Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.Note that when idle mode is terminated by a hardware reset, the device normally resumes program execution from where it left off, up to two machine cycles before the internal reset algorithm takes control. On-chip hardware inhibits access to internal RAM in this event, but access to the port pins is not inhibited. To eliminate the possibility of an unexpected write to a port pin when idle mode is terminated by a reset, the instruction following the one that invokes idle mode should not write to a port pin or to external memory.

Parameters:

Technical/Catalog Information	AT89C55WD-24PI
Vendor	Atmel
Category	Integrated Circuits (ICs)
Program Memory Size	20K x 8
RAM Size	256 x 8
Number of I /O	32
Package / Case	40-DIP
Speed	24MHz
Controller Series	89C
Oscillator Type	Internal
Packaging	Tube
Program Memory Type	FLASH
EEPROM Size	-
Core Processor	8051
Data Converters	-
Core Size	8-Bit
Operating Temperature	-40°C ~ 85°C
Connectivity	UART/USART
Peripherals	WDT
Voltage - Supply (Vcc/Vdd)	4 V ~ 5.5 V
Lead Free Status	Contains Lead
RoHS Status	RoHS Non-Compliant
Other Names	AT89C55WD 24PI AT89C55WD24PI