AT89C2051 View Datasheet(PDF) - Unspecified
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AT89C2051 Datasheet PDF : 26 Pages
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Evalu8r User Manual V2.00
Module Specifications
Evalu8r Technical Specification
Power Input ...........: a. +9 volts DC nominal (+25 volts Max)
................................. b. +9v DC unregulated, or +5v DC regulated.
Power Connectors .: a. Standard 2.5mm ROKA type-centre positive.
................................. Accepts Equinox Power Supply
................................. b. Screw Terminals to accept external bench PSU.
................................. Pin 1 +5v
................................. Pin 2 +9v
................................. Pin 3 0v.
Serial Port...............: 3-wire asynchronous Communications interface, TxD, RxD, GND (RS-232
................................. compatible).
Serial Connector ....: 9 way female D-type connector, PC compatible via. 1:1 cable
................................. Pin 2 - TxD Output from Evalu8r
................................. Pin 3 - RxD Input to Evalu8r
................................. Pin 5 - GND Signal Ground connection
A/D Convertor........: Simple current source and comparator technique
................................. GND Signal Ground
................................. REF Voltage ramp from 65uA into
.................................
100nF approx.
................................. AIN Input to Evalu8r. Max range 0v to
.................................
+5v (clamped)
.................................
Noise filter built-in 10K/100nF approx.
Status Indication....: Power-ON & PROG LED’s.
Sounder ..................: PIEZO type
Device profiles .......: 8, 20 and 40-pin devices are supported. There is room to fit either a 20-pin or a
................................. 40-pin ZIF socket if required.
ISP Compatibility ...: Equinox standard 10-way Header
Other I/O ................: 5 switches and 8 LED’s on 20/40 pin microcontroller port pins.
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