QW1 TechTools, QW1 Datasheet - Page 27

• 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

© 2007 TechTools
2.4.2
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ICP with Self Powered Targets
Overview
In-Circuit Programming Cable Pinout
None
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.
Avoid or isolate any other circuitry that touches the MCLR line.
Ideally, use RB6 (clock), RB7(data) and RB3 (LVP/PGM pin, RB4 or RB5 on some PICmicros)
Always connect the ground pin.
Decide who powers the target and address the trade-offs involved. (see:
When programming, enable the PICmicro MCU's power-up timer Fuse Option if possible.
PIN Number | Signal Name
---------------------------------------------
1.
2.
3.
4.
5.
6.
7.
** Only necessary for some FLASH devices.
as OUTPUTs in your circuit design OR connect them to outside-world connections or NO
switches so that nothing is driving them during programming. This avoids any need for
isolation. If that is not desirable, design to isolate or tri-state anything that drives these
lines.
Powered Targets
Particularly if setting the device for internal MCLR or internal OSC.
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).
VPP (MCLR)
VDD (+5)
GND ( - )
RB7 (data)
RB6 (clock)
NC
LVP (RB3/RB4/RB5) **
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)
| KEY
RED
White
White
White
White
Pin Block
White
QuickWriter MCU Programmer
ICP with Self
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