Programmable Interval Timer
ver 1.05
OVERVIEW
The D8254 is a programmable interval
timer/counter, binary compatible with industry
standard 82C54. The D8254 solves one of
the most common problems in any micro-
computer system, the generation of accurate
time delays under software control. The
D8254 can be used as a:
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Real time clock
Even counter
Digital one-shot
Programmable rate generator
Square wave generator
Binary rate multiplier
Complex waveform generator
Complex motor controller
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Simple interface allows easy connection
to microcontrollers
Fully synthesizable, static design with no
internal tri-states
DELIVERABLES
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Source code:
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VHDL Source Code or/and
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VERILOG Source Code or/and
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Encrypted, or plain text EDIF netlist
VHDL & VERILOG test bench environ-
ment
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Active-HDL automatic simulation mac-
ros
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ModelSim automatic simulation macros
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Tests with reference responses
Technical documentation
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Installation notes
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HDL core specification
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Datasheet
Synthesis scripts
Example application
Technical support
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IP Core implementation support
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3 months maintenance
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Delivery the IP Core updates, mi-
nor and major versions changes
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Delivery the documentation up-
dates
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Phone & email support
KEY FEATURES
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Three independent 16-bit counters
Six programmable Counter modes
Interrupt on terminal count
Hardware retriggerable One-Shot
Rate Generator
Square wave mode
Software triggered strobe
Hardware triggered strobe
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Binary or BCD counting
Status Read Back Command
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are trademarks of their respective owners.
Copyright 1999-2003 DCD 鈥?Digital Core Design. All Rights Reserved.
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