OT: RE: [aprssig] D-710 at FCC test site
droobie at maine.rr.com
Tue Aug 7 12:04:42 CDT 2007
I have yet to find one.. I did write about this a few years
ago. Perhaps this'll help you?
>I've seen a LOT of traffic and took the time to read all of your
>posts over the last 4 or 5 days (I've been subscribed since Oct 2002
>though). I believe in Kenwood as a company, and I believe in the D7*
>hardware as my ideal mobile interface for APRS. I've been up since
>yesterday purely because I wanted to set things to rest and popped
>the lid on my radio. Thank you all for my sleepless nights. :-)
>First and foremost, I bought my radio shortly after I became a
>licensed operator in MAY 2002. I bought it from Gigaparts and its
>SN is 31100088. It is a TM-D700A unit.
>Next, the Flash chip inside the D700A is NEC Part number:
>D78F4218AGC .. It is a 78K4 style microcontroller, the F is (FLASH),
>the type is 784218A, and it is a GC package, which is a 100 pin
>LQFP. It has 256K of flash memory. The NON-Flash version is the
>non-F model, and it has 192K of MASKED ROM which can be updated only
>using ROM extensions (basically writing updates into unused portions
>of the 192K). Since mine is the Flash version, no problem.
>More info at:
>Ok, so we have a flash chip in the D700.. BUT - How do we program it?
>No problem! It just so happens to serial in-circuit flash the
>78F4218A using the 3 wire Serial I/O Flash, you need SCK2, SI2, SO2,
>Vpp, RESET, Vdd, Vpp, X1, and Vss.
>There's a nice 10 pin connector near the flash for this purpose on
>the D700 board.
>D700 NEC SIGNAL
>1 44 P24/BUZ
>2 81 Vdd
>3 94 TEST/Vpp (NOTE 2 - Vpp pin is for 78F4218A and AY)
>4 15 RESET
>5 39 P72/ASCK2/SCK2
>6 37 P70/RxD2/SI2
>7 38 P71/TxD2/SO2
>8 33 AVss
>9 -- NO SIGNAL
>10 -- NO SIGNAL
>Note that every pin needed to flash the unit is on the 10 pin
>connector near the flash. It is clear to me that Kenwood knew what
>they were doing.
>Furthermore, the Tasco radio is cabled using a flat cable and has a
>Kenwood part number. This means if they really wanted to they could
>offer a new TNC as a part, just in case unavoidable issues
>happened. The TNC also has a Samsung flash part of its own.
Drew Baxter (Dr. Droo), Project Coordinator / Network Developer
@Network Data Group - Inspiration in High Speed
Phone: 207-942-0275 / Cellular: 207-356-9143 / Toll-Free: 866-715-3311
E-Mail: droobie at maine.rr.com / Cellular: mobiledroo at 1-X.net
At 11:04 AM 8/7/2007, Scott Miller wrote:
>Is there a published spec? Some of the Freescale device programmers
>are rather expensive, but you can build your own for a few bucks
>with information that's in the data sheet.
>Not that I'd want to tackle reverse-engineering the D710...
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