HT83C51DC

HT83C51DC Datasheet

High Temperature 83C51 Microcontroller HT83C51

Part	Datasheet
HT83C51DC	HT83C51DC (pdf)

Related Parts	Information
HT83C51	HT83C51

PDF Datasheet Preview
High Temperature 83C51 Microcontroller HT83C51 The HT83C51 is a monolithic 8-bit microcontroller that is pin equivalent to the Intel 8XC51FC microcontroller. Fabricated with Honeywell’s HTMOS dielectrically isolated high temperature process, the HT83C51 is designed specifically for severe high temperature applications such as downhole oil well, aerospace, turbine engine and industrial control. The HT83C51 uses the standard MCS-51 instruction set which is optimized for control applications. Pin-for-pin equivalent to the MCS-51 series product, it is compatible with all known development environments. Key features include the programmable counter array, watch dog timer, enhanced serial port for multi-processor communication and a hierarchical interrupt structure. Software selectable idle is included for reduced power. The HT83C51 varies from the standard 83C51FC, in that it supports half-duplex serial communication, and has 8k Bytes of Mask programmable ROM. The device is available in a standard pinout DIP, with optional packages considered. These microcontrollers provide guaranteed performance supporting operating frequencies in excess of 16 MHz over the full -55 to +225ºC temperature range. Typically, parts will operate up to +300ºC for a year, with derated performance. Downhole Oil Well, Avionics, Turbine Engine Control, Industrial Process Control, Nuclear Reactor, Electric Power Conversion, and Heavy Duty Internal Combustion Engine Specified Over -55 to +225°C On-Chip Oscillator 8-bit CPU Optimized for 5 Volt Control Applications Interrupt Structure with Seven Sources and Four Priority Levels Four 8-bit Bidirectional Parallel Ports Half Duplex Programmable Serial Port with Framing Error Detection and Automatic Address Recognition Three 16-bit Timer/Counters with One Up/Down Timer/Counter and Clock Out 256 Bytes Internal Data Memory 64K External Data Memory Address Space Hermetic 40-pin Ceramic Dip MCS-51 Compatible Instructions Set Parts burned in at 250ºC Programmable Counter Array with: Capture/Compare, Software Timer with Watchdog Capability, High Speed Output, and Pulse Width Modulator HT83C51 FUNCTIONAL DIAGRAM HT83C51 PIN DESCRIPTIONS VDD +5V Supply Voltage VSS Circuit Ground Port 0 P0.0 P0.7 Port 0 is an 8-bit bidirectional I/O port. If external Program and/or Data memory are used, port 0 cannot be used for general purpose I/O. During accesses to external Program and Data memory Port 0 is used as the low-order multiplexed address and data bus. In this mode, Port 0 pins use strong internal pullups when emitting 1’s, and are TTL compatible. IF external Program and Data memory are not used, Port 0 pins can be used as general purpose I/O. When the Port pins have 1’s written to them in I/O mode, the pins are floating and can be driven as inputs. An external pullup is required to generate logic high output in I/O mode. Port 1 P1.0-P1.7 Port 1 is an 8-bit bidirectional I/O port with internal pullups. The output buffers can drive TTL loads. When the Port 1 pins have 1’s written to them, they are pulled high by the internal pullups and can be used as inputs in this state. As inputs, any pins that are externally pulled low will source current because of the pullups. In addition, Port 1 pins have the alternate uses shown in the table below: Port Pin P3.0 P3.1 P3.2 P3.3 P3.4 P3.5 P3.6 P3.7 Name Alternate Function RXD Serial port input TXD Serial port output INT0n External interrupt 0 INT1n External interrupt 1 External clock input for Timer 0 External clock input for Timer 1 WRn External Data Memory write strobe RDn External Data Memory read strobe Port 2 P2.0-P2.7 Port 2 is an 8-bit bidirectional I/O port with internal pullups. The output buffers can drive TTL loads. When the Port 2 pins have 1’s written to them, they are pulled high by the internal pullups and can be used as inputs in this state. As inputs, any pins that are externally pulled low will source current because of the pullups. Port 2 is used as the high-order address byte during accesses to external Porgram Memory and during accesses to external Data Memeory that use ORDERING INFORMATION THERMAL CHARACTERISTICS Assumes Static Air Convection Θjc 0.9ºC/W Θjc 32.8ºC/W 83C51 Process T = Hi Temp SOI Source H = Honeywell Part Type 83C51= Microcontroller Screening Level C= Commercial Package D = Standard Find out more For more information on Honeywell’s High Temperature Electronics visit us online at or contact us at Customer Service Email: Honeywell reserves the right to make changes to improve reliability, function or design. Honeywell does not assume any liability arising out of the application or use of any product or circuit described herein neither does it convey any license under its patent rights nor the rights of others. Honeywell International Inc. 12001 Highway 55 Plymouth, MN 55441 Tel 800-323-8295 w1w2w.hightempsolutions.com Form #900134 April 2011 Honeywell International Inc.

PDF Datasheet Preview

High Temperature 83C51 Microcontroller HT83C51

The HT83C51 is a monolithic 8-bit microcontroller that is pin equivalent to the Intel 8XC51FC microcontroller. Fabricated with Honeywell’s HTMOS dielectrically isolated high temperature process, the HT83C51 is designed specifically for severe high temperature applications such as downhole oil well, aerospace, turbine engine and industrial control.

The HT83C51 uses the standard MCS-51 instruction set which is optimized for control applications. Pin-for-pin equivalent to the MCS-51 series product, it is compatible with all known development environments. Key features include the programmable counter array, watch dog timer, enhanced serial port for multi-processor communication and a hierarchical interrupt structure. Software selectable idle is included for reduced power. The HT83C51 varies from the standard 83C51FC, in that it supports half-duplex serial communication, and has 8k Bytes of Mask programmable ROM. The device is available in a standard pinout DIP, with optional packages considered. These microcontrollers provide guaranteed performance supporting operating frequencies in excess of 16 MHz over the full -55 to +225ºC temperature range. Typically, parts will operate up to +300ºC for a year, with derated performance.

Downhole Oil Well, Avionics, Turbine Engine Control, Industrial Process Control, Nuclear Reactor, Electric Power Conversion, and Heavy Duty Internal Combustion Engine

Specified Over -55 to +225°C

On-Chip Oscillator
8-bit CPU Optimized for 5 Volt Control Applications

Interrupt Structure with Seven Sources and Four Priority

Levels

Four 8-bit Bidirectional Parallel Ports

Half Duplex Programmable Serial Port with Framing Error

Detection and Automatic Address Recognition

Three 16-bit Timer/Counters with One Up/Down

Timer/Counter and Clock Out
256 Bytes Internal Data Memory
64K External Data Memory Address Space

Hermetic 40-pin Ceramic Dip

MCS-51 Compatible Instructions Set

Parts burned in at 250ºC

Programmable Counter Array with:

Capture/Compare, Software Timer with Watchdog Capability, High Speed Output, and Pulse Width Modulator

HT83C51

FUNCTIONAL DIAGRAM

HT83C51

PIN DESCRIPTIONS

VDD +5V Supply Voltage

VSS Circuit Ground

Port 0 P0.0 P0.7 Port 0 is an 8-bit bidirectional I/O port. If external Program and/or Data memory are used, port 0 cannot be used for general purpose I/O. During accesses to external Program and Data memory Port 0 is used as the low-order multiplexed address and data bus. In this mode, Port 0 pins use strong internal pullups when emitting 1’s, and are TTL compatible. IF external Program and Data memory are not used, Port 0 pins can be used as general purpose I/O. When the Port pins have 1’s written to them in I/O mode, the pins are floating and can be driven as inputs. An external pullup is required to generate logic high output in I/O mode.

Port 1 P1.0-P1.7 Port 1 is an 8-bit bidirectional I/O port with internal pullups. The output buffers can drive TTL loads. When the Port 1 pins have 1’s written to them, they are pulled high by the internal pullups and can be used as inputs in this state. As inputs, any pins that are externally pulled low will source current because of the pullups. In addition, Port 1 pins have the alternate uses shown in the table below:

Port Pin P3.0 P3.1 P3.2 P3.3 P3.4 P3.5 P3.6 P3.7

Name Alternate Function

RXD Serial port input

TXD Serial port output

INT0n External interrupt 0

INT1n External interrupt 1

External clock input for Timer 0

External clock input for Timer 1

WRn External Data Memory write strobe

RDn External Data Memory read strobe

Port 2 P2.0-P2.7 Port 2 is an 8-bit bidirectional I/O port with internal pullups. The output buffers can drive TTL loads. When the Port 2 pins have 1’s written to them, they are pulled high by the internal pullups and can be used as inputs in this state. As inputs, any pins that are externally pulled low will source current because of the pullups.

Port 2 is used as the high-order address byte during accesses to external Porgram Memory and during accesses to external Data Memeory that use
ORDERING INFORMATION

THERMAL CHARACTERISTICS

Assumes Static Air Convection
Θjc
0.9ºC/W
Θjc
32.8ºC/W
83C51

Process T = Hi Temp SOI

Source H = Honeywell

Part Type 83C51=

Microcontroller

Screening Level

C= Commercial Package

D = Standard

Find out more

For more information on Honeywell’s High Temperature Electronics visit us online at or contact us at Customer Service Email:

Honeywell reserves the right to make changes to improve reliability, function or design. Honeywell does not assume any liability arising out of the application or use of any product or circuit described herein neither does it convey any license under its patent rights nor the rights of others.

Honeywell International Inc. 12001 Highway 55 Plymouth, MN 55441 Tel 800-323-8295 w1w2w.hightempsolutions.com

Form #900134 April 2011 Honeywell International Inc.

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 HT83C51DC Datasheet file may be downloaded here without warranties.

Datasheet ID: HT83C51DC 636277