AT87F55WD-24AC

AT87F55WD-24AC Datasheet

The AT87F55WD is a low-power, high-performance CMOS 8-bit microcomputer with 20K bytes of QuickFlash one-time programmable OTP 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 QuickFlash allows the program memory to be user programmed by a conventional nonvolatile memory programmer. By combining a versatile 8-bit CPU with QuickFlash on a monolithic chip, the Atmel AT87F55WD is a powerful microcomputer which provides a highly-flexible and cost-effective solution to many embedded control applications.

Part	Datasheet
AT87F55WD-24AC	AT87F55WD-24AC (pdf)

Related Parts	Information
AT87F55WD-24JI	AT87F55WD-24JI
AT87F55WD-24PC	AT87F55WD-24PC
AT87F55WD-24PI	AT87F55WD-24PI
AT87F55WD-24AI	AT87F55WD-24AI
AT87F55WD-24JC	AT87F55WD-24JC

PDF Datasheet Preview
• Compatible with MCS-51 Products • 20K Bytes of One-time Programmable QuickFlash Memory • 4V to 5.5V Operating Range • Fully Static Operation 0 Hz to 33 MHz • Three-level Program Memory Lock • 256 x 8-bit Internal RAM • 32 Programmable I/O Lines • Three 16-bit Timer/Counters • Eight Interrupt Sources • Programmable Serial Channel • Low-power Idle and Power-down Modes • Interrupt Recovery from Power-down Mode • Hardware Watchdog Timer • Dual Data Pointer • Power-off Flag The AT87F55WD is a low-power, high-performance CMOS 8-bit microcomputer with 20K bytes of QuickFlash one-time programmable OTP 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 QuickFlash allows the program memory to be user programmed by a conventional nonvolatile memory programmer. By combining a versatile 8-bit CPU with QuickFlash on a monolithic chip, the Atmel AT87F55WD is a powerful microcomputer which provides a highly-flexible and cost-effective solution to many embedded control applications. Pin Configurations TQFP 44 P1.4 43 P1.3 42 P1.2 41 P1.1 T2 EX 40 P1.0 T2 39 NC 38 VCC 37 P0.0 AD0 36 P0.1 AD1 35 P0.2 AD2 34 P0.3 AD3 P1.5 1 P1.6 2 P1.7 3 RST 4 RXD P3.0 5 NC 6 TXD P3.1 7 INT0 P3.2 8 INT1 P3.3 9 T0 P3.4 10 T1 P3.5 11 33 P0.4 AD4 32 P0.5 AD5 31 P0.6 AD6 30 P0.7 AD7 29 EA/VPP 28 NC 27 ALE/PROG 26 PSEN 25 P2.7 A15 24 P2.6 A14 23 P2.5 A13 PDIP T2 P1.0 1 T2EX P1.1 2 P1.2 3 P1.3 4 P1.4 5 P1.5 6 P1.6 7 P1.7 8 RST 9 RXD P3.0 10 TXD P3.1 11 INT0 P3.2 12 INT1 P3.3 13 T0 P3.4 14 T1 P3.5 15 WR P3.6 16 RD P3.7 17 XTAL2 18 XTAL1 19 GND 20 40 VCC 39 P0.0 AD0 38 P0.1 AD1 37 P0.2 AD2 36 P0.3 AD3 35 P0.4 AD4 34 P0.5 AD5 33 P0.6 AD6 32 P0.7 AD7 31 EA/VPP 30 ALE/PROG 29 PSEN 28 P2.7 A15 27 P2.6 A14 26 P2.5 A13 25 P2.4 A12 24 P2.3 A11 23 P2.2 A10 22 P2.1 A9 21 P2.0 A8 PLCC 8-bit Microcontroller with 20K Bytes QuickFlash AT87F55WD WR P3.6 12 RD P3.7 13 XTAL2 14 XTAL1 15 GND 16 GND 17 A8 P2.0 18 A9 P2.1 19 A10 P2.2 20 A11 P2.3 21 A12 P2.4 22 6 P1.4 5 P1.3 4 P1.2 3 P1.1 T2 EX 2 P1.0 T2 1 NC 44 VCC 43 P0.0 AD0 42 P0.1 AD1 41 P0.2 AD2 40 P0.3 AD3 P1.5 7 P1.6 8 P1.7 9 RST 10 RXD P3.0 11 NC 12 TXD P3.1 13 INT0 P3.2 14 INT1 P3.3 15 T0 P3.4 16 T1 P3.5 17 39 P0.4 AD4 38 P0.5 AD5 37 P0.6 AD6 36 P0.7 AD7 35 EA/VPP 34 NC 33 ALE/PROG 32 PSEN 31 P2.7 A15 30 P2.6 A14 29 P2.5 A13 WR P3.6 18 RD P3.7 19 XTAL2 20 XTAL1 21 GND 22 NC 23 A8 P2.0 24 A9 P2.1 25 A10 P2.2 26 A11 P2.3 27 A12 P2.4 28 Block Diagram VCC GND RAM ADDR. REGISTER P0.0 - P0.7 PORT 0 DRIVERS P2.0 - P2.7 PORT 2 DRIVERS PORT 0 LATCH PORT 2 LATCH QUICK FLASH B REGISTER STACK POINTER PROGRAM ADDRESS REGISTER PSEN ALE/PROG EA / VPP RST Ordering Information Speed MHz Power Supply 4.0V to 5.5V 4.5V to 5.5V Ordering Code AT87F55WD-24AC AT87F55WD-24JC AT87F55WD-24PC AT87F55WD-24AI AT87F55WD-24JI AT87F55WD-24PI AT87F55WD-33AC AT87F55WD-33JC AT87F55WD-33PC Package 44A 44J 40P6 44A 44J 40P6 44A 44J 40P6 Operation Range Commercial 0°C to 70°C Industrial -40°C to 85°C Commercial 0°C to 70°C = Preliminary Availability 44A 44J 40P6 Package Type 44-lead, Thin Plastic Gull Wing Quad Flatpack TQFP 44-lead, Plastic J-leaded Chip Carrier PLCC 40-lead, Wide, Plastic Dual Inline Package PDIP AT87F55WD Packaging Information 44A, 44-lead, Thin mm Plastic Gull Wing Quad Flat Package TQFP Dimensions in Millimeters and Inches * 44J, 44-lead, Plastic J-leaded Chip Carrier PLCC Dimensions in Inches and Millimeters PIN 1 ID BSC X 45° PIN NO. 1 IDENTIFY X 30° - 45° .650 16.5 SQ .685 17.4 SQ REF SQ X 45° MAX 3X *Controlling dimension millimeters 40P6, 40-pin, Wide, Plastic Dual Inline Package PDIP Dimensions in Inches and Millimeters JEDEC STANDARD MS-011 AC SEATING PLANE 0 REF 15 AT87F55WD 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. Printed on recycled paper.

PDF Datasheet Preview

• Compatible with MCS-51 Products
• 20K Bytes of One-time Programmable QuickFlash Memory
• 4V to 5.5V Operating Range
• Fully Static Operation 0 Hz to 33 MHz
• Three-level Program Memory Lock
• 256 x 8-bit Internal RAM
• 32 Programmable I/O Lines
• Three 16-bit Timer/Counters
• Eight Interrupt Sources
• Programmable Serial Channel
• Low-power Idle and Power-down Modes
• Interrupt Recovery from Power-down Mode
• Hardware Watchdog Timer
• Dual Data Pointer
• Power-off Flag

The AT87F55WD is a low-power, high-performance CMOS 8-bit microcomputer with 20K bytes of QuickFlash one-time programmable OTP 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 QuickFlash allows the program memory to be user programmed by a conventional nonvolatile memory programmer. By combining a versatile 8-bit CPU with QuickFlash on a monolithic chip, the Atmel AT87F55WD is a powerful microcomputer which provides a highly-flexible and cost-effective solution to many embedded control applications.

Pin Configurations

TQFP
44 P1.4 43 P1.3 42 P1.2 41 P1.1 T2 EX 40 P1.0 T2 39 NC 38 VCC 37 P0.0 AD0 36 P0.1 AD1 35 P0.2 AD2 34 P0.3 AD3

P1.5 1 P1.6 2 P1.7 3 RST 4 RXD P3.0 5

NC 6 TXD P3.1 7 INT0 P3.2 8 INT1 P3.3 9

T0 P3.4 10 T1 P3.5 11
33 P0.4 AD4 32 P0.5 AD5 31 P0.6 AD6 30 P0.7 AD7 29 EA/VPP 28 NC 27 ALE/PROG 26 PSEN 25 P2.7 A15 24 P2.6 A14 23 P2.5 A13

PDIP

T2 P1.0 1 T2EX P1.1 2

P1.2 3 P1.3 4 P1.4 5 P1.5 6 P1.6 7 P1.7 8 RST 9 RXD P3.0 10 TXD P3.1 11 INT0 P3.2 12 INT1 P3.3 13 T0 P3.4 14 T1 P3.5 15 WR P3.6 16 RD P3.7 17 XTAL2 18 XTAL1 19 GND 20
40 VCC 39 P0.0 AD0 38 P0.1 AD1 37 P0.2 AD2 36 P0.3 AD3 35 P0.4 AD4 34 P0.5 AD5 33 P0.6 AD6 32 P0.7 AD7 31 EA/VPP 30 ALE/PROG 29 PSEN 28 P2.7 A15 27 P2.6 A14 26 P2.5 A13 25 P2.4 A12 24 P2.3 A11 23 P2.2 A10 22 P2.1 A9 21 P2.0 A8

PLCC
8-bit Microcontroller with 20K Bytes QuickFlash

AT87F55WD

WR P3.6 12 RD P3.7 13

XTAL2 14 XTAL1 15

GND 16 GND 17 A8 P2.0 18 A9 P2.1 19 A10 P2.2 20 A11 P2.3 21 A12 P2.4 22
6 P1.4 5 P1.3 4 P1.2 3 P1.1 T2 EX 2 P1.0 T2 1 NC 44 VCC 43 P0.0 AD0 42 P0.1 AD1 41 P0.2 AD2 40 P0.3 AD3

P1.5 7 P1.6 8 P1.7 9 RST 10 RXD P3.0 11

NC 12 TXD P3.1 13 INT0 P3.2 14 INT1 P3.3 15

T0 P3.4 16 T1 P3.5 17
39 P0.4 AD4 38 P0.5 AD5 37 P0.6 AD6 36 P0.7 AD7 35 EA/VPP 34 NC 33 ALE/PROG 32 PSEN 31 P2.7 A15 30 P2.6 A14 29 P2.5 A13

WR P3.6 18 RD P3.7 19

XTAL2 20 XTAL1 21

GND 22 NC 23

A8 P2.0 24 A9 P2.1 25 A10 P2.2 26 A11 P2.3 27 A12 P2.4 28

Block Diagram

VCC GND

RAM ADDR. REGISTER

P0.0 - P0.7 PORT 0 DRIVERS

P2.0 - P2.7 PORT 2 DRIVERS

PORT 0 LATCH

PORT 2 LATCH

QUICK FLASH

B REGISTER

STACK POINTER

PROGRAM ADDRESS REGISTER

PSEN ALE/PROG

EA / VPP RST
Ordering Information

Speed MHz

Power Supply
4.0V to 5.5V
4.5V to 5.5V
Ordering Code AT87F55WD-24AC AT87F55WD-24JC AT87F55WD-24PC AT87F55WD-24AI AT87F55WD-24JI AT87F55WD-24PI AT87F55WD-33AC AT87F55WD-33JC AT87F55WD-33PC

Package 44A 44J 40P6 44A 44J 40P6 44A 44J 40P6

Operation Range Commercial 0°C to 70°C

Industrial -40°C to 85°C

Commercial 0°C to 70°C
= Preliminary Availability
44A 44J 40P6

Package Type 44-lead, Thin Plastic Gull Wing Quad Flatpack TQFP 44-lead, Plastic J-leaded Chip Carrier PLCC 40-lead, Wide, Plastic Dual Inline Package PDIP

AT87F55WD

Packaging Information
44A, 44-lead, Thin mm Plastic Gull Wing Quad Flat Package TQFP Dimensions in Millimeters and Inches *
44J, 44-lead, Plastic J-leaded Chip Carrier PLCC Dimensions in Inches and Millimeters

PIN 1 ID BSC

X 45° PIN NO. 1 IDENTIFY

X 30° - 45°
.650 16.5 SQ
.685 17.4 SQ

REF SQ

X 45° MAX 3X
*Controlling dimension millimeters
40P6, 40-pin, Wide, Plastic Dual Inline Package PDIP Dimensions in Inches and Millimeters

JEDEC STANDARD MS-011 AC

SEATING PLANE
0 REF 15

AT87F55WD

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.

Printed on recycled paper.

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 AT87F55WD-24AC Datasheet file may be downloaded here without warranties.

Datasheet ID: AT87F55WD-24AC 519059