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Topics - jdr

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PXA-Gx9 / Flash Magic Interface
« on: April 28, 2016, 08:09:34 am »
What does Flash Magic do exactly with the Interface selection set on "None(ISP)" as opposed to "FDI USB-ICP-80C51ISP" when you are using the 80C51 programmer? It seems to still control the DTR and RTS lines at least with the "Assert DTR and RTS while COM Port open" selected in Advanced Options/Hardware Config.

« on: March 18, 2016, 09:06:11 am »
Programming a PXA-G49 with an 80C51ISP. I have the Flash Magic utility setting at: Advanced Options/Hardware Config: "Assert DTR and RTS while COM port open"
The attached scope images are of the TX/RX lines and they indicate that the chip gets the "f"... looks like it responds incorrectly the first time then correctly the second time and then a transmission begins... then fails. It throws a "unable to communicate" error.
I am using this setting because I can not get past the autobaud "f" without holding the PSEN down.
What could be the problem?
Thanks for your time.

PXA-Gx9 / USB-ICP-80C51ISP on a XA-G49
« on: February 19, 2016, 03:01:20 pm »
Programming an XA-G49 with a USB-ICP-80C51ISP. The scope is showing that the Reset line (at the microcontroller) is never being pulled low. The PSEN IS being pulled low. The programmer is suppose to pull the reset low... isn't it or do I have to do that? Also PIN 13 (Tx on microcontroller) is being pulled low then released. Nothing on PIN 11(Rx on microcontroller from Tx on programmer). It is failing the Device Signature.

Thanks for your time

PXA-Gx9 / In Application Programming for XA-G49
« on: February 10, 2016, 07:48:36 am »
Anybody have any advice on using IAP to allow a XA-G49 to be programmed only accessing the two serial lines (RX, TX). Trying to simulate the feature allowed in latter chips called "Break Set" where it enters the ISP mode when it receives a "low" on the RX line for x number of cycles.


PXA-Gx9 / ISP entry
« on: January 22, 2016, 08:56:27 am »
I have an XA-G49 on a system with only the "minimum pin" access pictured in Data Sheet Figure 4. How do I enter ISP for reprogramming.

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