D8254 データシートの表示（PDF） - Digital Core Design
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D8254 Datasheet PDF : 4 Pages
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D8254
Programmable Interval Timer
ver 1.08
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:
● Real time clock
● Even counter
● Digital one-shot
● Programmable rate generator
● Square wave generator
● Binary rate multiplier
● Complex waveform generator
● Complex motor controller
KEY FEATURES
● 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
● Binary or BCD counting
● Status Read Back Command
All trademarks mentioned in this document
are trademarks of their respective owners.
● Simple interface allows easy connection
to microcontrollers
● Fully synthesizable, static design with no
internal tri-states
DELIVERABLES
♦ Source code:
◊ VHDL Source Code or/and
◊ VERILOG Source Code or/and
◊ Encrypted, or plain text EDIF netlist
♦ VHDL & VERILOG test bench environ-
ment
◊ Active-HDL automatic simulation mac-
ros
◊ ModelSim automatic simulation macros
◊ Tests with reference responses
♦ Technical documentation
◊ Installation notes
◊ HDL core specification
◊ Datasheet
♦ Synthesis scripts
♦ Example application
♦ Technical support
◊ IP Core implementation support
◊ 3 months maintenance
● Delivery the IP Core updates, mi-
nor and major versions changes
● Delivery the documentation up-
dates
● Phone & email support
http://www.DigitalCoreDesign.com
http://www.dcd.pl
Copyright 1999-2007 DCD – Digital Core Design. All Rights Reserved.
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