QW1 TechTools, QW1 Datasheet - Page 64

• 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

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If enabled, this feature will halt program execution anytime the stack is "pushed" beyond its capacity or
"popped" too many times.
PicTools Manual 3.0
Stack Viewing is only available with 14bit device emulation and Mathias firmware Version 2.1 or
The first line in the stack window keeps tra ck of the stack depth. When the stack is full, this line
turns yellow. If an additional CALL is executed, this line turns RED, the program is halted and
you receive the message "Stack OverFlow".
If too many RETURNs are executed, the message will read "Stack UnderFlow", and the
stack window may show new return addresses. These new addresses actually exist in the
stack and are left-over from previous CALLs. When the stack is "empty" and a RET is
executed, the stack pointer moves from the top of the stack to the bottom of the stack.
So the underflow actually copies whatever value is located at the bottom of the stack
into the program counter; which could be garbage or a real address from a previous
stack operation.
The items listed in the Stack Window beneath the Depth line are the RETURN
ADDRESSES that have been pushed onto the stack. This will help you track down the
cause of a stack overflow. However, if further analysis is required on a stack underflow, a
Trace Buffer Module
history, making it possible to back-track the code flow.
higher and Break on Stack Over/Underflow is not available on 12bit or 16C5X devices.
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is required ( part #CVMT2 ). This will give you an execution
Note:
© 2007 TechTools