QW1 TechTools, QW1 Datasheet - Page 26

• Manufacturer Part Number: QW1
• Description: PROGRAMMER PIC MCU QUICKWRITER
• Manufacturer: TechTools
• Series: QuickWriter™r
• Type: QuickWriterr

Specifications of QW1

• Contents: MCU Programmer with In-Circuit Serial Programming Cable and Optional GANG Adapters
• For Use With/related Products: PIC Micro® MCU
• For Use With: CBL-ICSP - CABLE PROG QUICKWRITER SERIALQW-4SSOP18 - ADAPTER QUICKWRITER 4GANG 18SSOPQW-4SSOP28 - ADAPTER QUICKWRITER 4GANG 28SSOPQW-4SO8/14W - ADAPT QUICKWRTR 4GANG 8/14SOIC WQW-4SO8/14N - ADAPT QUICKWRTR 4GANG 8/14SOIC NQW-4SOIC18 - ADAPTER QUICKWRITER 4GANG 18SOICQW-4ZIF18 - ADAPTER QUICKWRITER 4-GANG 18ZIFQW-4SOIC28 - ADAPTER QUICKWRITER 4GANG 28SOICQW-4PLCC44 - ADAPTER QUICKWRITER 4GANG 44PLCCQW-4ZIF40/28 - ADAPT QUICKWRITER 4GANG 40/28ZIFMP-ZIF14 - ADAPTER QUICKWRITER 14-PIN ZIFMP-SOIC8/14 - ADAPTER QUICKWRITER 8/14-SOICMP-SSOP18 - ADAPTER QUICKWRITER 18-SSOPMP-SSOP28 - ADAPTER QUICKWRITER 28-SSOPMP-14000 - ADAPTR QUICKWRTR PIC14000 28-PINMP-SOIC18 - ADAPTER QUICKWRITER 18-SOICMP-SOIC28 - ADAPTER QUICKWRITER 28-SOICMP-PLCC44 - ADAPTER QUICKWRITER 44-PIN PLCCMP-ZIF18/28 - ADAPTER QUICKWRITER 18/28PIN ZIFMP-ZIF40 - ADAPTER QUICKWRITER 40-PIN ZIF

5.2
24
Shortcuts
ICP with Self Powered Targets
Overview
Details
QuickWriter Help 2.1
None
programming cycle. In self-powered target boards, this requires that we ask the operator to do the
power cycling for us. This can become tedious for the operator. Even with devices that only require
a single power up and down, it would still be nice to free the operator from this burden. To enable
full automation of in-circuit programming, without violating programming specs, QuickWriter
provides a control signal called TVDDEN.
When using the "Self Powered Target" option, QuickWriter provides two ways of determining when
to activate your target circuits power supply.
1. Operator Notification for manual activation/deactivation.
2. Hardware Control Signal (TVDDEN) for electronic activation/deactivation (automation).
Operator Notification
QuickWriter can supply up to 100 ma of current on the VDD signal (5 volts) when programming
MCUs in-circuit. This includes the current required by the MCU during programming (20 to 50
ma).
When programming MCUs in-circuit, it is sometimes desirable or even necessary for the circuit to
supply its own power. If the target circuit has larger current requirements or if it is not feasible to
power the circuit from the 5 volt power trace (i.e. when this will apply 5 volts to the output of a
voltage regulator), then you should choose QuickWriter's "Monitor a Self Powered Target" option.
When the circuit supplies its own power, we have to be concerned with voltage sequence and
timing requirements of the MCU.
The programming algorithms for some devices require that the device's VDD be enabled/disabled
several times during a
When QuickWriter is ready for the target's power supply to be turned on or off, it will display a
notification dialog that includes the current voltage reading. Once the required voltage condition
is met, this dialog will automatically close and QuickWriter will continue operation.
** Only necessary for some FLASH devices.
Holds LVP/PGM low to disable Low Voltage Programming.
(connect to RB3 on 16F87X devices, RB4 on PIC16F62X and
RB5 on 18 series MCUs if needed).
©2006 TechTools