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PASBW for SpyBiWire
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SpyBiWire (SBW) adapter for MSP430 JTAG programmers for MSP430F20xx.

It features:

  • Adapts any SpyBiWire capable JTAG programmer to a 4-pin format
  • Blends and buffers the JTAG signals appropriately.
  • Avoids circuitry errors, you only need to wire to your target fixture.
  • Includes a keyed 4-pin cable and spare connector.

This item has been discontinued and may no longer be ordered.

Related Items

  • Program and debug SpyBiWire devices with our USBP.
  • Production program SpyBiWire devices quickly with our REP430.
  • Get more 4-pin SpyBiWire cables by ordering our CBLI2C.

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Downloads

PASBW Flyer With schematic and jumper settings

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FAQs

Q1: What is the pinout of the PASBW?
A1: The target connector on the PASBW has the following signals:

Pin1234
NAMEGNDVCCSBWTDIOSBWTCK
Label-+DC

Note that SBWTCK, pin 4, is square.

Q2: Does the PASBW support the REP430?
A2: Yes! Be sure to use TIs newly released REP430 code for the SBW, available on our REP430 page. The new code is in the Downloads section. Be sure to keep the cable length small with the REP430.

Q3: What does my SpyBiWire target circuit require for proper operation?
A3: A minimum SpyBiWire target circuit needs the following:

1. A 0.1uF cap on VCC.
2. A cap in the 270pF to 1000pF range on SBWTDIO/RST to ground.
3. A 47k pullup resistor on SBWTDIO/RST.

The PASBW handles all other required signal conditioning and blending for you, keeping your target board component count to a minimum, and maximizing the chance of a successful first-try SpyBiWire experience.

Note that SpyBiWire is very sensitive to timing and cable length. If you are having trouble connecting with SpyBiWire, make sure that the total signal length from pod to target chip pins, including traces on your board, is less than eight inches, although six inches is better. If you are still having trouble, check the RST (SBWTDIO) cap to make sure it fits the range noted above. Also, SpyBiWire implementations must NOT have push-pull type of watchdog/brownout/SVS devices on RST (SBWTDIO) as this signal must be absolutely under the control of the programming pod. Use ONLY an open-drain type of supervisory device here.

Q4: What is the 4-pin cable for, and what do the colors indicate?
A4: The four pin cable is intended to be cut and soldered into your target fixture. The colors are meaningless, and may switch to simply gray in the future.

We did not want to force all target boards to fit a specific small connector format, so we thought an easy-to-handle 4-pin cable would be better for most purposes. We also enclose an additional keyed 4-pin connector to allow you the flexibility of building your own mating connector without having to find and order this connector style just to get one of them.

Regardless of the approach you take in your project, just be sure to cut the cable to keep the overall length to a minimum.

Q5: I am using a six inch JTAG cable and the full 9-inch 4-pin SBW cable. Even with all of this length, I am still able to connect to my target just fine. Should I still cut my cable?
A5: Even though it is working in your lab or on the shop floor with the extra length, we recommend that you still keep the overall pod-to-pin length to a minimum, to increase your yield and prevent nagging failures due to normal process variation from chip to chip and board to board.

As an example, using a 20% cap on the SBWTDIO signal may give you ten boards in a row that work in your lab because these particular parts came from your prototyping reel, but when your contract manufacturer starts using the "same" value from another vendor's reel, you may experience lots of failures. Let's sidestep that possibility from the beginning, so trim those cables!

Q6: Why can't I get my Olimex parallel port pod to work with SpyBiWire, even when I use your PASBW?
A6: TI is not supporting SpyBiWire on ANY parallel port pod, not even their own. Only USB pods, such as our USBP, or other high-speed devices, such as our stand-alone REP430 replicator, are capable of supporting SpyBiWire. Our PASBW is compatible with any device which can perform SpyBiWire operations.

Q7: What is the manufacturer and part number for the 4-pin connector on the PASBW?
A7: This item is available from Oupiin America, part number 4071-04TS.

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Leave Feedback

As SoftBaugh continues efforts to increase features, along with ease of use, we find and consider feedback and suggestions essential to creating a better product for the customer.

Please note that if your intent is to receive technical support, or you if have general questions regarding this item, it is best to contact SoftBaugh directly, by phone or e-mail.

Feedback Form

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Return Policy:
We will gladly accept returns on products as long as you notify us for an RMA number within 30-days and the items are returned in a re-saleable condition. Non-defective returned products are subject to a 20% restocking fee. Items damaged due to misuse are not returnable.

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Handling Fee: Unless otherwise specified, SoftBaugh orders under $100.00 USD will be subject to a $10.00 USD handling fee.

Signature Proof of Delivery Required: We require a signature for all shipments. If you wish to waive the signature requirement, please mention it in the order comments. If you choose to waive the signature you assume all responsibility for receipt of the shipment.

Restocking Fee: All non-defective returns are subject to a 20% restocking fee. Shipping charges are not refundable. Product must be unopened in original packaging and suitable for resale. Products held for over 30 days or returned without a Return Material Authorization will not be accepted. Items damaged due to customer mishandling or misuse are not returnable. Software is not returnable.

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Credit cards: We accept American Express, Visa, and MasterCard. If you wish to pay using one of these credit card types, fill out the form on the confirmation email you receive after placing your order and fax it back to us. International customers paying by credit card do not incur a wire fee.

Trademark notices: MSP430 and C2000 and specific MSP430 and C2000 part numbers are trademarks of Texas Instruments. EW430, IAR, IAR Systems, IAR Embedded Workbench, IAR MakeApp, C-SPY, visualSTATE, From Idea to Target and IAR KickStart Kit are trademarks or registered trademarks owned by IAR Systems AB. SoftBaugh and the SoftBaugh logo are registered trademarks of SoftBaugh, Inc. SoftBaugh board nomenclature and LCD part numbers are the trademark of SoftBaugh, Inc. Zigbee is the trademark of the Zigbee Alliance.

 
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