AT89C51RC-24PC

AT89C51RC-24PC Datasheet


The AT89C51RC is a low-power, high-performance CMOS 8-bit microcontroller with 32K bytes of Flash programmable read only memory and 512 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. A total of 512 bytes of internal RAM are available in the AT89C51RC. The 256-byte expanded internal RAM is accessed via MOVX instructions after clearing bit 1 in the SFR located at address 8EH. The other 256-byte RAM segment is accessed the same way as the Atmel AT89-series and other 8052-compatible products. By combining a versatile 8-bit CPU with Flash on a monolithic chip, the Atmel AT89C51RC is a powerful microcomputer which provides a highly-flexible and cost-effective solution to many embedded control applications.

Part Datasheet
AT89C51RC-24PC AT89C51RC-24PC AT89C51RC-24PC (pdf)
Related Parts Information
AT89C51RC-24AC AT89C51RC-24AC AT89C51RC-24AC
AT89C51RC-24PI AT89C51RC-24PI AT89C51RC-24PI
AT89C51RC-24JI AT89C51RC-24JI AT89C51RC-24JI
AT89C51RC-24AI AT89C51RC-24AI AT89C51RC-24AI
AT89C51RC-24JC AT89C51RC-24JC AT89C51RC-24JC
PDF Datasheet Preview
• Compatible with Products
• 32K Bytes of Reprogrammable Flash Memory
• Endurance 1000 Write/Erase Cycles
• 4V to 5.5V Operating Range
• Fully Static Operation 0 Hz to 33 MHz
• Three-level Program Memory Lock
• 512 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 AT89C51RC is a low-power, high-performance CMOS 8-bit microcontroller with 32K bytes of Flash programmable read only memory and 512 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. A total of 512 bytes of internal RAM are available in the AT89C51RC. The 256-byte expanded internal RAM is accessed via MOVX instructions after clearing bit 1 in the SFR located at address 8EH. The other 256-byte RAM segment is accessed the same way as the Atmel AT89-series and other 8052-compatible products. By combining a versatile 8-bit CPU with Flash on a monolithic chip, the Atmel AT89C51RC is a powerful microcomputer which provides a highly-flexible and cost-effective solution to many embedded control applications.

The AT89C51RC provides the following standard features 32K bytes of Flash, 512 bytes of RAM, 32 I/O lines, three 16-bit timer/counters, a six-vector two-level interrupt architecture, a full duplex serial port, on-chip oscillator, and clock circuitry. In addition, the AT89C51RC 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 external interrupt or hardware reset.
8-bit Microcontroller with 32K Bytes Flash

AT89C51RC

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

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

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
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
2 AT89C51RC

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

FLASH

AT89C51RC

B REGISTER

STACK POINTER
Ordering Information

Speed MHz

Power Supply
4.0V to 5.5V
4.5V to 5.5V
Ordering Code AT89C51RC-24AC AT89C51RC-24JC AT89C51RC-24PC AT89C51RC-24AI AT89C51RC-24JI AT89C51RC-24PI AT89C51RC-33AC AT89C51RC-33JC AT89C51RC-33PC

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

AT89C51RC

Operation Range Commercial 0°C to 70°C Industrial
-40°C to 85°C Commercial 0°C to 70°C
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
44A TQFP

PIN 1 e

PIN 1 IDENTIFIER

B E1 E

A1 A2 L

This package conforms to JEDEC reference MS-026, Variation ACB. Dimensions D1 and E1 do not include mold protrusion. Allowable
protrusion is mm per side. Dimensions D1 and E1 are maximum plastic body size dimensions including mold mismatch. Lead coplanarity is mm maximum.

COMMON DIMENSIONS Unit of Measure = mm

SYMBOL MIN

NOM MAX

NOTE

Note 2 Note 2
2325 Orchard Parkway R San Jose, CA 95131
44A, 44-lead, 10 x 10 mm Body Size, mm Body Thickness, mm Lead Pitch, Thin Profile Plastic Quad Flat Package TQFP
34 AT89C51RC
44J PLCC

AT89C51RC

PIN NO. 1 IDENTIFIER
e D1 D

D2/E2

A2 A1 A
0.51 0.020 MAX 3X

COMMON DIMENSIONS Unit of Measure = mm

This package conforms to JEDEC reference MS-018, Variation AC. Dimensions D1 and E1 do not include mold protrusion.

Allowable protrusion is mm per side. Dimension D1 and E1 include mold mismatch and are measured at the extreme material condition at the upper or lower parting line. Lead coplanarity is mm maximum.

SYMBOL MIN NOM MAX NOTE

Note 2

Note 2

D2/E2

TITLE 2325 Orchard Parkway 44J, 44-lead, Plastic J-leaded Chip Carrier PLCC R San Jose, CA 95131
10/04/01
40P6 PDIP

D PIN 1

SEATING PLANE
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Datasheet ID: AT89C51RC-24PC 519087