AT89C1051U-12SC

AT89C1051U-12SC Datasheet

The AT89C1051U is a low-voltage, high-performance CMOS 8-bit microcomputer with 1K byte of Flash programmable and erasable read only memory. It has the same functionality and operation as the AT89C1051 with the addition of a UART programmable serial port. The device is manufactured using Atmel’s high-density nonvolatile memory technology and is compatible with the industry-standard MCS-51 instruction set. By combining a versatile 8-bit CPU with Flash on a monolithic chip, the Atmel AT89C1051U is a powerful microcomputer which provides a highly-flexible and costeffective solution to many embedded control applications.

Part	Datasheet
AT89C1051U-12SC	AT89C1051U-12SC (pdf)

Related Parts	Information
AT89C1051U-24PI	AT89C1051U-24PI
AT89C1051U-24SC	AT89C1051U-24SC
AT89C1051U-24PC	AT89C1051U-24PC
AT89C1051U-24SI	AT89C1051U-24SI
AT89C1051U-12SI	AT89C1051U-12SI
AT89C1051U-12PC	AT89C1051U-12PC
AT89C1051U-12PI	AT89C1051U-12PI

PDF Datasheet Preview
• Compatible with MCS-51 Products • 1K Bytes of Reprogrammable Flash Memory Endurance 1,000 Write/Erase Cycles • 2.7V to 6V Operating Range • Fully Static Operation 0 Hz to 24 MHz • Two-level Program Memory Lock • 64 x 8-bit Internal RAM • 15 Programmable I/O Lines • Two 16-bit Timer/Counters • Six Interrupt Sources • Programmable Serial UART Channel • Direct LED Drive Outputs • On-chip Analog Comparator • Low-power Idle and Power-down Modes The AT89C1051U is a low-voltage, high-performance CMOS 8-bit microcomputer with 1K byte of Flash programmable and erasable read only memory. It has the same functionality and operation as the AT89C1051 with the addition of a UART programmable serial port. The device is manufactured using Atmel’s high-density nonvolatile memory technology and is compatible with the industry-standard MCS-51 instruction set. By combining a versatile 8-bit CPU with Flash on a monolithic chip, the Atmel AT89C1051U is a powerful microcomputer which provides a highly-flexible and costeffective solution to many embedded control applications. The AT89C1051U provides the following standard features 1K byte of Flash, 64 bytes of RAM, 15 I/O lines, two 16-bit timer/counters, a five-vector, two-level interrupt architecture, a full duplex serial port, a precision analog comparator, on-chip oscillator and clock circuitry. In addition, the AT89C1051U is designed with static logic for operation down to zero frequency and supports two software-selectable power saving modes. The Idle Mode stops the CPU while allowing the RAM, timer/counters, serial port and interrupt system to continue functioning. The power-down mode saves the RAM contents but freezes the oscillator disabling all other chip functions until the next hardware reset. 8-bit Microcontroller with 1K Byte Flash AT89C1051U Pin Configuration PDIP/SOIC RST/VPP 1 RXD P3.0 2 TXD P3.1 3 XTAL2 4 XTAL1 5 INT0 P3.2 6 INT1 P3.3 7 TO P3.4 8 T1 P3.5 9 GND 10 20 VCC 19 P1.7 18 P1.6 17 P1.5 16 P1.4 15 P1.3 14 P1.2 13 P1.1 AIN1 12 P1.0 AIN0 11 P3.7 Block Diagram VCC GND RAM ADDR. REGISTER FLASH B REGISTER STACK POINTER PROGRAM ADDRESS REGISTER TMP2 TMP1 BUFFER ALU PSW INTERRUPT, SERIAL PORT, AND TIMER BLOCKS TIMING AND CONTROL INSTRUCTION REGISTER ANALOG COMPARATOR PORT1 LATCH PORT3 LATCH PORT1 DRIVERS PORT3 DRIVERS PC INCREMENTER PROGRAM COUNTER DPTR P1.0 - P1.7 P3.0 - P3.5 P3.7 AT89C1051U AT89C1051U Pin Description Ordering Information Speed MHz Power Supply 2.7V to 6.0V 4.0V to 6.0V Ordering Code AT89C1051U-12PC AT89C1051U-12SC AT89C1051U-12PI AT89C1051U-12SI AT89C1051U-24PC AT89C1051U-24SC AT89C1051U-24PI AT89C1051U-24SI AT89C1051U Package 20P3 20S 20P3 20S 20P3 20S 20P3 20S Operation Range Commercial 0°C to 70°C Industrial -40°C to 85°C Commercial 0°C to 70°C Industrial -40°C to 85°C 20P3 20S Package Type 20-lead, Wide, Plastic Dual In-line Package PDIP 20-lead, Wide, Plastic Gull Wing Small Outline SOIC Packaging Information 20P3, 20-lead, Wide, Plastic Dual In-line Package PDIP Dimensions in Inches and Millimeters JEDEC STANDARD MS-001 AD SEATING PLANE 0 REF 15 20S, 20-lead, Wide, Plastic Gull Wing Small Outline SOIC Dimensions in Inches and Millimeters PIN 1 0 REF AT89C1051U Atmel Headquarters Corporate Headquarters 2325 Orchard Parkway San Jose, CA 95131 TEL 408 441-0311 FAX 408 487-2600 Europe Atmel U.K., Ltd. Coliseum Business Centre Riverside Way Camberley, Surrey GU15 3YL England TEL 44 1276-686-677 FAX 44 1276-686-697 Asia Atmel Asia, Ltd. Room 1219 Chinachem Golden Plaza 77 Mody Road Tsimhatsui East Kowloon Hong Kong TEL 852 2721-9778 FAX 852 2722-1369 Japan Atmel Japan K.K. 9F, Tonetsu Shinkawa Bldg. 1-24-8 Shinkawa Chuo-ku, Tokyo 104-0033 Japan TEL 81 3-3523-3551 FAX 81 3-3523-7581 Atmel Operations Atmel Colorado Springs 1150 E. Cheyenne Mtn. Blvd. Colorado Springs, CO 80906 TEL 719 576-3300 FAX 719 540-1759 Atmel Rousset Zone Industrielle 13106 Rousset Cedex France TEL 33 4-4253-6000 FAX 33 4-4253-6001 Fax-on-Demand North America 1- 800 292-8635 International 1- 408 441-0732 e-mail Web Site BBS 1- 408 436-4309 Atmel Corporation Atmel Corporation makes no warranty for the use of its products, other than those expressly contained in the Company’s standard warranty which is detailed in Atmel’s Terms and Conditions located on the Company’s web site. The Company assumes no responsibility for any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and does not make any commitment to update the information contained herein. No licenses to patents or other intellectual property of Atmel are granted by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel’s products are not authorized for use as critical components in life support devices or systems. Marks bearing and/or are registered trademarks and trademarks of Atmel Corporation. Terms and product names in this document may be trademarks of others.

PDF Datasheet Preview

• Compatible with MCS-51 Products
• 1K Bytes of Reprogrammable Flash Memory

Endurance 1,000 Write/Erase Cycles
• 2.7V to 6V Operating Range
• Fully Static Operation 0 Hz to 24 MHz
• Two-level Program Memory Lock
• 64 x 8-bit Internal RAM
• 15 Programmable I/O Lines
• Two 16-bit Timer/Counters
• Six Interrupt Sources
• Programmable Serial UART Channel
• Direct LED Drive Outputs
• On-chip Analog Comparator
• Low-power Idle and Power-down Modes

The AT89C1051U is a low-voltage, high-performance CMOS 8-bit microcomputer with 1K byte of Flash programmable and erasable read only memory. It has the same functionality and operation as the AT89C1051 with the addition of a UART programmable serial port. The device is manufactured using Atmel’s high-density nonvolatile memory technology and is compatible with the industry-standard MCS-51 instruction set. By combining a versatile 8-bit CPU with Flash on a monolithic chip, the Atmel AT89C1051U is a powerful microcomputer which provides a highly-flexible and costeffective solution to many embedded control applications.

The AT89C1051U provides the following standard features 1K byte of Flash, 64 bytes of RAM, 15 I/O lines, two 16-bit timer/counters, a five-vector, two-level interrupt architecture, a full duplex serial port, a precision analog comparator, on-chip oscillator and clock circuitry. In addition, the AT89C1051U is designed with static logic for operation down to zero frequency and supports two software-selectable power saving modes. The Idle Mode stops the CPU while allowing the RAM, timer/counters, serial port and interrupt system to continue functioning. The power-down mode saves the RAM contents but freezes the oscillator disabling all other chip functions until the next hardware reset.
8-bit Microcontroller with 1K Byte Flash

AT89C1051U

Pin Configuration

PDIP/SOIC

RST/VPP 1 RXD P3.0 2 TXD P3.1 3

XTAL2 4 XTAL1 5 INT0 P3.2 6 INT1 P3.3 7 TO P3.4 8 T1 P3.5 9

GND 10
20 VCC 19 P1.7 18 P1.6 17 P1.5 16 P1.4 15 P1.3 14 P1.2 13 P1.1 AIN1 12 P1.0 AIN0 11 P3.7

Block Diagram

VCC GND

RAM ADDR. REGISTER

FLASH

B REGISTER

STACK POINTER

PROGRAM ADDRESS REGISTER

TMP2

TMP1

BUFFER

ALU PSW

INTERRUPT, SERIAL PORT, AND TIMER BLOCKS

TIMING AND

CONTROL

INSTRUCTION REGISTER

ANALOG COMPARATOR

PORT1 LATCH

PORT3 LATCH

PORT1 DRIVERS

PORT3 DRIVERS

PC INCREMENTER

PROGRAM COUNTER

DPTR

P1.0 - P1.7

P3.0 - P3.5

P3.7

AT89C1051U

AT89C1051U

Pin Description
Ordering Information

Speed MHz

Power Supply
2.7V to 6.0V
4.0V to 6.0V
Ordering Code

AT89C1051U-12PC AT89C1051U-12SC

AT89C1051U-12PI AT89C1051U-12SI

AT89C1051U-24PC AT89C1051U-24SC

AT89C1051U-24PI AT89C1051U-24SI

AT89C1051U

Package
20P3 20S
20P3 20S
20P3 20S
20P3 20S

Operation Range

Commercial 0°C to 70°C

Industrial -40°C to 85°C

Commercial 0°C to 70°C

Industrial -40°C to 85°C
20P3 20S

Package Type 20-lead, Wide, Plastic Dual In-line Package PDIP 20-lead, Wide, Plastic Gull Wing Small Outline SOIC

Packaging Information
20P3, 20-lead, Wide, Plastic Dual In-line Package PDIP Dimensions in Inches and Millimeters

JEDEC STANDARD MS-001 AD

SEATING PLANE
0 REF 15
20S, 20-lead, Wide, Plastic Gull Wing Small Outline SOIC Dimensions in Inches and Millimeters

PIN 1
0 REF

AT89C1051U

Atmel Headquarters

Corporate Headquarters 2325 Orchard Parkway San Jose, CA 95131 TEL 408 441-0311 FAX 408 487-2600

Europe Atmel U.K., Ltd. Coliseum Business Centre Riverside Way Camberley, Surrey GU15 3YL England TEL 44 1276-686-677 FAX 44 1276-686-697

Asia Atmel Asia, Ltd. Room 1219 Chinachem Golden Plaza 77 Mody Road Tsimhatsui East Kowloon Hong Kong TEL 852 2721-9778 FAX 852 2722-1369

Japan Atmel Japan K.K. 9F, Tonetsu Shinkawa Bldg. 1-24-8 Shinkawa Chuo-ku, Tokyo 104-0033 Japan TEL 81 3-3523-3551 FAX 81 3-3523-7581

Atmel Operations

Atmel Colorado Springs 1150 E. Cheyenne Mtn. Blvd. Colorado Springs, CO 80906 TEL 719 576-3300 FAX 719 540-1759

Atmel Rousset Zone Industrielle 13106 Rousset Cedex France TEL 33 4-4253-6000 FAX 33 4-4253-6001

Fax-on-Demand North America 1- 800 292-8635 International 1- 408 441-0732
e-mail

Web Site

BBS 1- 408 436-4309

Atmel Corporation Atmel Corporation makes no warranty for the use of its products, other than those expressly contained in the Company’s standard warranty which is detailed in Atmel’s Terms and Conditions located on the Company’s web site. The Company assumes no responsibility for any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and does not make any commitment to update the information contained herein. No licenses to patents or other intellectual property of Atmel are granted by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel’s products are not authorized for use as critical components in life support devices or systems.

Marks bearing and/or are registered trademarks and trademarks of Atmel Corporation. Terms and product names in this document may be trademarks of others.

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived AT89C1051U-12SC Datasheet file may be downloaded here without warranties.

Datasheet ID: AT89C1051U-12SC 519078