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[FRAM71] Pre-Production Batch
06-10-2015, 04:04 AM (This post was last modified: 06-10-2015 05:16 AM by Dave Frederickson.)
Post: #135
RE: [FRAM71] Pre-Production Batch
(06-08-2015 07:13 AM)Oulan Wrote:  Yes I would be interested with pics for modding a module, but first I need to get a spare module ...

Here's one way to make a "serviceable" OD module.

1. Obtain a donor module.

2. Remove the module cover. I haven't found an easy way to do this, but I use a hobby knife and a combination of cutting and scraping along the cover edges at about a 45 degree angle. Remove the circuit board. That's the hard part.

Click to zoom
[Image: osor-JRUPyJAMD0r_G5ZH7yOpiKmJgUHN4gmuy4D...32-h774-no]

3. Apply Kapton tape to both sides of the pins. This will support them during soldering.

[Image: m2PW4uJIl1QFPTxeM5ci3mEV84ekQir1Lds780Sz...32-h774-no]

4. Flip the board over and solder a wire between pins 1 (VDD) and 11 (OD). Without the tape the pins, which are unsupported, could become misaligned or fall off when soldered.

[Image: Udko9Yzz0s4jYctgmq9zAMez22t0ibtLRPZ9AztB...32-h774-no]

5. Flip the board back over and cut the Kapton tape with a hobby knife along the top of the pins and in between pins 1 & 2 and 5 & 6. Remove the excess tape leaving pins 2 - 5 insulated by the tape. This isolates the BUS[0:3] data lines.

[Image: DIOkP4e4R0dTXxdIgMOgw0xJ-McN4vVrgKyaY61N...32-h774-no]

6. Put the whole thing back together and close with Kapton tape. Make sure the tape goes around the middle of the module and goes all the way around as this is where the pins apply significant pressure.

[Image: sSKkXaEoNasHhfsEocok_5ECCPXjTPbFvKYg4_2F...32-h774-no]

When the module is inserted into Port 1 it pulls the Output Disable (OD) signal TRUE, disabling SYSROM and allowing FRAM71's SYSRAM to take over. Since the BUS signals are prevented from making connection, the module has no effect on FRAM71's memory configuration. The module is "serviceable" in that it can be opened up easily if the tape needs to be replaced or reverted back to it's original function by removing the tape, cutting a wire, and taping the module back together.

Comments and suggestions are appreciated. Smile

Dave
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Messages In This Thread
ROM Images - Dave Frederickson - 12-10-2014, 03:51 AM
IRAM vs ROM - Dave Frederickson - 12-13-2014, 06:36 PM
ROMCOPY - Dave Frederickson - 12-20-2014, 08:59 PM
[FRAM71] Bankswitching? - Hans Brueggemann - 02-07-2015, 06:55 PM
v430 beta - Dave Frederickson - 02-16-2015, 06:09 AM
RE: [FRAM71] Pre-Production Batch - cruff - 02-11-2015, 11:45 PM
v430 beta - Dave Frederickson - 02-17-2015, 05:14 AM
v430 beta - Dave Frederickson - 02-27-2015, 05:20 AM
1MByte FRAM71 - Dave Frederickson - 03-14-2015, 09:18 PM
RE: [FRAM71] Pre-Production Batch - Gene - 03-15-2015, 02:04 AM
V501 Firmware woes - Hans Brueggemann - 04-23-2015, 07:12 PM
Eagerly awaiting mine - cruff - 04-24-2015, 12:40 AM
RE: [FRAM71] Pre-Production Batch - cruff - 04-24-2015, 12:53 PM
Received my FRAM71 today! - cruff - 04-25-2015, 07:03 PM
RE: [FRAM71] Pre-Production Batch - cruff - 04-26-2015, 12:27 PM
RE: [FRAM71] Pre-Production Batch - Erwin - 10-04-2016, 08:28 PM
MEMBUF - Dave Frederickson - 05-13-2015, 02:50 AM
FRAM71 V502 - Hans Brueggemann - 05-16-2015, 04:02 PM
RE: [FRAM71] Pre-Production Batch - Erwin - 01-02-2016, 08:13 AM
RE: [FRAM71] Pre-Production Batch - Oulan - 06-03-2015, 02:10 PM
RE: [FRAM71] Pre-Production Batch - Oulan - 06-03-2015, 03:47 PM
RE: [FRAM71] Pre-Production Batch - Oulan - 06-05-2015, 09:44 AM
RE: [FRAM71] Pre-Production Batch - Oulan - 06-08-2015, 07:13 AM
RE: [FRAM71] Pre-Production Batch - Dave Frederickson - 06-10-2015 04:04 AM
FlashPRO - Dave Frederickson - 06-11-2015, 03:42 PM
RE: [FRAM71] Pre-Production Batch - cruff - 06-13-2015, 12:04 PM
RE: [FRAM71] Pre-Production Batch - cruff - 06-15-2015, 11:22 PM
Blinkin' Lights - Dave Frederickson - 07-15-2015, 03:07 AM
FRAM71 LED - Hans Brueggemann - 07-16-2015, 11:47 AM
RE: [FRAM71] Pre-Production Batch - Andres - 01-25-2016, 10:40 PM
RE: [FRAM71] Pre-Production Batch - Erwin - 10-04-2016, 08:46 PM
RE: [FRAM71] Pre-Production Batch - Erwin - 10-04-2016, 09:04 PM



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