Details, datasheet, quote on part number: AT87F51-12
PartAT87F51-12
CategoryMicrocontrollers
TitleCISC->8051/80C51 Family->EEPROM/Flash
Description8-bit Microcontroller With 4k Bytes Quickflash (tm)
CompanyATMEL Corporation
DatasheetDownload AT87F51-12 datasheet
  

 

Features, Applications
Features

Compatible with MCS-51TM Products 4K Bytes of User Programmable QuickFlashTM Memory Fully Static Operation: to 24 MHz Three-Level Program Memory Lock x 8-Bit Internal RAM 32 Programmable I/O Lines Two 16-Bit Timer/Counters Six Interrupt Sources Programmable Serial Channel Low Power Idle and Power Down Modes

Description

The is a low-power, high-performance CMOS 8-bit microcomputer with 4K bytes of QuickFlash Programmable Read Only Memory. The device is manufactured using Atmel's high density nonvolatile memory technology and is compatible with the industry standard MCS-51TM 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 is a powerful microcomputer which provides a highly flexible and cost effective solution to many embedded control applications. (continued)


PSEN ALE/PROG EA / VPP RST PORT 1 LATCH PORT 3 LATCH TIMING AND CONTROL INSTRUCTION REGISTER DPTR

The AT87F51 provides the following standard features: 4K bytes of QuickFlash, 128 bytes of RAM, 32 I/O lines, two 16-bit timer/counters, a five vector two-level interrupt architecture, a full duplex serial port, on-chip oscillator and clock circuitry. In addition, the AT87F51 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. when emitting 1s. During accesses to external data memory that use 8-bit addresses (MOVX @ RI), Port 2 emits the contents of the P2 Special Function Register. Port 2 also receives the high-order address bits and some control signals during QuickFlash programming and verification. Port 3 Port an 8-bit bidirectional I/O port with internal pullups. The Port 3 output buffers can sink/source four TTL inputs. When 1s are written to Port 3 pins they are pulled high by the internal pullups and can be used as inputs. As inputs, Port 3 pins that are externally being pulled low will source current (IIL) because of the pullups. Port 3 also serves the functions of various special features of the AT87F51 as listed below:

Port Pin P3.6 P3.7 Alternate Functions RXD (serial input port) TXD (serial output port) INT0 (external interrupt 0) INT1 (external interrupt 1) T0 (timer 0 external input) T1 (timer 1 external input) WR (external data memory write strobe) RD (external data memory read strobe)

VCC Supply voltage. GND Ground. Port 0 Port an 8-bit open drain bidirectional I/O port. As an output port each pin can sink eight TTL inputs. When 1s are written to port 0 pins, the pins can be used as highimpedance inputs. Port 0 may also be configured to be the multiplexed loworder address/data bus during accesses to external program and data memory. In this mode P0 has internal pullups. Port 0 also receives the code bytes during QuickFlash programming, and outputs the code bytes during program verification. External pullups are required during program verification. Port 1 Port an 8-bit bidirectional I/O port with internal pullups. The Port 1 output buffers can sink/source four TTL inputs. When 1s are written to Port 1 pins they are pulled high by the internal pullups and can be used as inputs. As inputs, Port 1 pins that are externally being pulled low will source current (IIL) because of the internal pullups. Port 1 also receives the low-order address bytes during QuickFlash programming and verification. Port 2 Port an 8-bit bidirectional I/O port with internal pullups. The Port 2 output buffers can sink/source four TTL inputs. When 1s are written to Port 2 pins they are pulled high by the internal pullups and can be used as inputs. As inputs, Port 2 pins that are externally being pulled low will source current (IIL) because of the internal pullups. Port 2 emits the high-order address byte during fetches from external program memory and during accesses to external data memory that use 16-bit addresses (MOVX @ DPTR). In this application it uses strong internal pullups

Port 3 also receives some control signals for QuickFlash programming and verification. RST Reset input. A high on this pin for two machine cycles while the oscillator is running resets the device. ALE/PROG Address Latch Enable output pulse for latching the low byte of the address during accesses to external memory. This pin is also the program pulse input (PROG) during QuickFlash programming. In normal operation ALE is emitted at a constant rate of 1/6 the oscillator frequency, and may be used for external timing or clocking purposes. Note, however, that one ALE pulse is skipped during each access to external Data Memory. If desired, ALE operation can be disabled by setting bit 0 of SFR location 8EH. With the bit set, ALE is active only during a MOVX or MOVC instruction. Otherwise, the pin is weakly pulled high. Setting the ALE-disable bit has no effect if the microcontroller is in external execution mode. PSEN Program Store Enable is the read strobe to external program memory.


 

Related products with the same datasheet
AT87F51-12JI
AT87F51-16
AT87F51-20
AT87F51-24
AT87F51-33
AT87F51-33AC
AT87F51-33AI
AT87F51-33JC
AT87F51-33JI
AT87F51-33PC
AT87F51-33PI
Some Part number from the same manufacture ATMEL Corporation
AT87F51-12AC 8-bit Microcontroller With4k Bytes Quickflash
AT87F51-12JI 8-bit Microcontroller With 4k Bytes Quickflash (tm)
AT87F51-12JI44J 8-bit Microcontroller With4k Bytes Quickflash
AT87F51-16 8-bit Microcontroller With 4k Bytes Quickflash (tm)
AT87F51-16AC 8-bit Microcontroller With4k Bytes Quickflash
AT87F51-20 8-bit Microcontroller With 4k Bytes Quickflash (tm)
AT87F51-20AC 8-bit Microcontroller With4k Bytes Quickflash
AT87F51-24 8-bit Microcontroller With 4k Bytes Quickflash (tm)
AT87F51-24AC 8-bit Microcontroller With4k Bytes Quickflash
AT87F51-33 8-bit Microcontroller With 4k Bytes Quickflash (tm)
AT87F51RC 8-bit Microcontroller With 32k Bytes Quickflash(tm)
AT87F52 8-bit Microcontroller With 8k Bytes Quickflash (tm)
AT87F55 8-bit Microcontroller With 20k Bytes Quickflash(tm)
AT87F55WD 80C32 Microcontroller With 20K OTP Quickflash

AT28C256E-20PI : 256k (32k X 8) Paged CMOS E2PROM

AT29C256-70C : 256k (32k X 8) 5-volt Only Flash Memory

AT89C52-12QC : CISC->8051/80C51 Family->EEPROM/Flash 8-bit Microcontroller With 8k Bytes Flash

AT91M40400 : RISC->RISC 16/32-bit Microcontroller, 2.7V to 3.6V Operating Range

MEGAICE : In-circuit Emulator

AT24C512N-10SU-2.7 : Two-wire Serial Eeprom

AT89C51AC3 : 8-bit Microcontroller with 4K Bytes Flash

AT91SAM7S32-AU-999 : AT91 ARM® Thumb®-based Microcontrollers Atmel’s AT91SAM7S is a series of low pincount Flash microcontrollers based on the 32-bit ARM RISC processor. It features a high-speed Flash and an SRAM, a large set of peripherals, including a USB 2.0 device (except for the AT91SAM7S32), and a complete set o

AT91SAM7SE32-CU-999 : The AT91SAM7SE256 is a Flash microcontroller with external memory bus based on the 32-bit ARM7TDMI RISC processor. It features 256K bytes of embedded high-speed Flash with sector lock capabilities and a security bit, and 32K bytes of SRAM. The integrated proprietary SAM-BA Boot Assistant enables in-

AT25080A-10PN-2.7 : 1K X 8 SPI BUS SERIAL EEPROM, PDIP8 Specifications: Density: 8 kbits ; Number of Words: 1 k ; Bits per Word: 8 bits ; Bus Type: Serial ; Production Status: Full Production ; Data Rate: 5 MHz ; Supply Voltage: 5V ; Package Type: 0.300 INCH, PLASTIC, MS-001BA, DIP-8, DIP ; Pins: 8 ; Operating Range: AUTOMOTIVE ; Operating Temperature: -

AT28HC256-12DM/883 : 32K X 8 EEPROM 5V, 120 ns, CDIP28 Specifications: Density: 262 kbits ; Number of Words: 32 k ; Bits per Word: 8 bits ; Bus Type: Parallel ; Production Status: Full Production ; Access Time: 120 ns ; Logic Family: CMOS ; Supply Voltage: 5V ; Package Type: 0.600 INCH, CERDIP-28 ; Pins: 28 ; Operating Range: Industrial ; Operating Temp

TS80C51RD2-LCMB : 8-BIT, 40 MHz, MICROCONTROLLER, PDIP40 Specifications: Data Bus: 8 Bit ; Life Cycle Stage: ACTIVE ; Clock Speed: 40 MHz ; Supply Voltage: 4.5 to 5.5 volts ; I/O Ports: 32 ; Package Type: CDIP, Other, PLASTIC, DIP-40 ; Operating Range: Commercial ; Pin Count: 40 ; Operating Temperature: 0 to 70 C (32 to 158 F) ; Features: PWM

 
0-C     D-L     M-R     S-Z