HT83C51DB ETC, HT83C51DB Datasheet

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HT83C51DB

Manufacturer Part Number
HT83C51DB
Description
HIGH TEMPERATURE 83C51 MICROCONTROLLER
Manufacturer
ETC
Datasheet
HTMOS
HIGH TEMPERATURE 83C51
MICROCONTROLLER
FEATURES
• HTMOS Specified Over -55 to +225 C
• 8-bit CPU Optimized For 5 Volt Control Applications
• Four 8-bit Bidirectional Parallel Ports
• Three 16-bit Timer/Counters with One Up/Down
• Programmable Counter Array with:
• Interrupt Structure with Seven Sources and
• Half Duplex Programmable Serial Port with:
• 64K External Program Memory Address Space
GENERAL DESCRIPTION
The HT83C51 is a monolithic 8-bit microcontroller that is
pin equivalent to the Intel 8XC51FC microcontroller. Fab-
ricated with Honeywell’s dielectrically isolated high-tem-
perature (HTMOS™) process, it is designed specifically for
severe high-temperature applications such as down-hole
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
Timer/Counter and Clock Out
– Capture/Compare
– Software Timer with Watchdog Capability
– High Speed Output
– Pulse Width Modulator
Four Priority Levels
– Framing Error Detection
– Automatic Address Recognition
Solid State Electronics Center • 12001 State Highway 55, Plymouth, MN 55441 • (800) 323-8295 • http://www.ssec.honeywell.com
TM
High Temperature Products
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 program-
mable 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 +225 C temperature range. Typically,
parts will operate up to +300 C for a year, with derated
performance. All parts are burned in at 250 C to eliminate
infant mortality.
• Hermetic 40-Pin Ceramic DIP
• 64K External Data Memory Address Space
• 256 Bytes Internal Data Memory
• 8K Byte Mask ROM
• On-Chip Oscillator
• MCS-51Compatible Instruction Set
APPLICATIONS
• Down-Hole Oil Well
• Avionics
• Turbine Engine Control
• Industrial Process Control
• Nuclear Reactor
• Electric Power Conversion
• Heavy Duty Internal Combustion Engines
HT83C51
Preliminary

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HT83C51DB Summary of contents

Page 1

TM HTMOS High Temperature Products HIGH TEMPERATURE 83C51 MICROCONTROLLER FEATURES • HTMOS Specified Over -55 to +225 C • 8-bit CPU Optimized For 5 Volt Control Applications • Four 8-bit Bidirectional Parallel Ports • Three 16-bit Timer/Counters with One Up/Down ...

Page 2

HT83C51 FUNCTIONAL BLOCK DIAGRAM B B Register Register PSENn ALE EAn RST Osc. XTAL1 XTAL2 P2.0 - P2.7 P0.0 - P0.7 Port O Port 2 Drivers Drivers Port O Port 2 RAM Latch Latch Stack ACC Pointer TMP2 TMP1 Special ...

Page 3

... EAn: External Access Enable. The EAn pin must be strapped to VSS for the HT51 to fetch code from external Program Memory locations 0000H to 1FFFH. The EAn pin must be strapped to VDD for internal program execution from memory locations 0000H to 1FFFH. ...

Page 4

... There are 8 Kbytes of internal program memory in the HT51. The EAn pin must be tied to Vdd (power) to enable access to internal program memory locations. When the EAn pin is tied to Vdd, program fetches to addresses 0000H to 1FFFH will be made to internal program ROM. Program fetches to addresses 2000H through FFFFH are to external memory ...

Page 5

PCA COUNTER /TIMER The Programmable Counter Array (PCA) contains a single 16-bit counter/timer made up of the CL and CH registers. This timer is used by all 5 capture/compare modules. Its clock input can be programmed to be from one ...

Page 6

HT83C51 DC CHARACTERISTICS ...

Page 7

EXTERNAL PROGRAM AND DATA MEMORY CHARATERISTICS Symbol Parameter TCLCL Clock Period 1/TCLCL Oscillator Frequency TLHLL ALE Pulse Width TAVLL Address Valid to ALE Low TLLAX Address hold after ALE low TLLIV ALE low to Valid Instruction In TLLPL ALE Low ...

Page 8

HT83C51 EXTERNAL PROGRAM MEMORY READ CYCLE TLHLL ALE TAVLL PSENn PORT 0 PORT 2 EXTERNAL DATA MEMORY READ CYCLE ALE TLHLL PSENn RDn TAVLL from RI or DPL PORT 0 PORT 2 EXTERNAL DATA MEMORY WRITE CYCLE ...

Page 9

SERIAL PORT TIMING CHARACTERISTICS—SHIFT REGISTER MODE (MODE 0) Symbol Parameter TXLXL Serial Port Clock Period TQVXH Output Data Setup to Clock Rising Edge TXHQX Output Data Hold after Clock Rising Edge TXHDX Input Data Hold after Clock Rising Edge TXHDV ...

Page 10

HT83C51 PERFORMANCE CURVES OVER TEMPERATURE -100 0 100 Temperature ( C) Maximum frequency vs. temperature Frequency (MHz) Operating current vs. frequency vs. temperature 5.0 ...

Page 11

PROGRAMMING THE MASK ROM The HT83C51 has 8K bytes of on-chip mask program- mable ROM. The part is usable with or without this memory space personalised. Once the designer’s code has been finalized, the ROM information can be transmitted to ...

Page 12

HT83C51 40-LEAD PACKAGE DETAIL 1 Ceramic Kovar Body Lid [ (width) THERMAL CHARACTERISTICS ORDERING INFORMATION D - Indicates package type Standard DIP *For packaging options, call Honeywell To learn more about Honeywell Solid ...

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