Control Diagram For Remote I/O 4-Wire Control - Equinox Systems ISPnano I Series User Manual

Distributor of Equinox Technologies: Excellent Integrated System Limited
Datasheet of ISPNANO S3 KIT - ISP PORTABLE PROGRAMMER
Contact us: sales@integrated-circuit.com Website: www.integrated-circuit.com

2.7.3 Control diagram for Remote I/O 4-wire Control

The control sequence for the '4-wire Control' method is detailed below.
Fig. 2.8.2 Control diagram for 4-wire Control
Remote
System
Start Signal
(START)
Programmer
Active
Signal
(SPARE)
Programmer
FAIL
Signal
(FAIL)
Programmer
OK
Signal
(OK)
1
Key Programmer / Remote System Action
1 The Remote System asserts the programmer <START> signal to initiate the execution of a
'Programming Project'.
2 The programmer will then assert the <ACTIVE> signal to indicate that it has commenced
programming.
3 At the end of the Programming operation the programmer asserts either the <OK> or <FAIL>
signal depending on the outcome.
4 The Remote System must then de-assert the <Start> signal to allow the programmer to reset
ready to program the next device.
(i.e. performing programming operation)
2
Programmer
is Active
Programming operation
FAILED
(FAIL signal driven HIGH)
or
Programming operation
OK (PASS)
(OK signal driven HIGH)
Either 'OK' or 'FAIL' signal is asserted by the
programmer.
3 4