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DS1216E Pinout - want to try and make a replacement

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    DS1216E Pinout - want to try and make a replacement

    DS1216 chips (the DIP16) version are all over the place and seem to be readily available. I was looking at this, and wondering why nobody has made a quick PCB adapter for it (DIP28 socket on top, and pins on bottom) so we can adapt to a DS1216E.

    Looking at the pinouts on the DIP16, and how they relate to the DIP28, I'm still missing some information (I don't have a unit to do this testing on, so have been going by the reference on this page and Maxim's data sheet https://pdfserv.maximintegrated.com/...16-DS1216H.pdf.

    Code:
    DS1216 PIN/DESC     DIP28 PIN/DESC
    1 X1                         UNKNOWN, goes to pad
    2 X2                         UNKNOWN, goes to pad
    3 WE*                      PIN 8, WE*
    4 BAT1                     n/c - goes to +3V battery
    5 GND                      PIN 14, GND
    6 D                          PIN 10, A0
    7 Q                          PIN 11, DQ0
    8 GND                      PIN 14, GND
    9 ROM/RAM*            UNKNOWN, goes to pad
    10 CE0*                   PIN 20, CE0*
    11 CE1*                   UNKNOWN, goes to pad
    12 OE*                     PIN 22, OE*
    13 RST*                   PIN 1, RST*
    14 BAT2                   n/c - goes to +3V battery
    15 Vcc0                   UNKNOWN, goes to pad
    16 Vcc1                    PIN 28, VCC
    So, five unknowns and these to potentially pick from on the DIP28:
    Pin 26: VccB
    Pin 27: WE* (but that looked already used?)

    Anyone want to help contribute and correct? I'm in a bit of a brain fog, so I really need some help to double check these, especially if you have one of these and can meter out the pins.

    Thanks!

    #2
    Originally posted by acadiel View Post
    DS1216 chips (the DIP16) version are all over the place and seem to be readily available. I was looking at this, and wondering why nobody has made a quick PCB adapter for it (DIP28 socket on top, and pins on bottom) so we can adapt to a DS1216E.
    Hi acadiel, already done using an SMD DS1215. ATM I've designed a standard 28 pin version that works well in a Model II, 2 different versions for the 4P that allow the use of either the standard rom/2532 or a 2732 without any mods to the computer and one for the System 80 that doesn't work haven't had time to fix that one yet. Duane Saylor's original software modified to suit.
    Attached Files

    Comment


      #3
      Sweet! Will this work in the 1000 series? Are they for sale anywhere?

      Comment


        #4
        Working on a SmartWatch replacement here using a supercap so there's no battery to replace. It also uses Batten & Allen leadframe pins so it won't destroy single-wipe sockets. Here's the GW-1244-1, which is for the NVRAM version of the SmartWatch:





        Full writeup here:

        http://www.glitchwrks.com/2018/03/17/gw-1244-1

        Currently working on a time-sensitive project for VCF East, this one shouldn't be too hard to knock out once VCF East is done though.

        Henry Courbis has a SmartWatch replacement sold as a NoSlotClock on Reactive Micro, but I don't know if he's selling just the bare boards.
        Check out The Glitch Works | My Retro Projects | Vintage Computer Services | Glitch Works Tindie Store -- Vintage Computer Kits and More

        Comment


          #5
          I have found about 75% success with one of the sellers on ebay, and they are reasonable on best offers.

          But I like that glitch works item....looks like a good alternative if you have an open ROM socket.

          Comment


            #6
            Originally posted by acadiel View Post
            Sweet! Will this work in the 1000 series? Are they for sale anywhere?
            The 28 pin version is pin for pin the same as the original DS1216E so in theory it should work on a 1000 but as yet untested.
            Working perfectly on my Model II and two 4Ps.
            Just had a peek in the cave, I still have a few of the 4P boards but I don't have any more of the 28 pin boards in stock. SMD DS1215s are no problem but unless I get a few orders I wont be ordering any more boards - don't want to get stuck with a lot of stuff collecting dust.

            Comment


              #7
              I wont be ordering any more boards - don't want to get stuck with a lot of stuff collecting dust.
              Hi Gazza.

              Please count me in for one Model 12 board.
              Your Model II version works fine.

              Comment


                #8
                Originally posted by Hans01 View Post
                Hi Gazza.

                Please count me in for one Model 12 board.
                Your Model II version works fine.
                Hi Hans
                Another BIG Tandy, how many of these things do you have?
                OK that's' one plus another 4 Model IIs I haven't even looked at yet.
                BTW are you using any extra ram cards in your big Tandys?
                Reason is, the Model II Smartwatch software has to fiddle with port 0FFH and hoping it's not causing any problems.
                Gazza

                Comment


                  #9
                  Hi Gazza.

                  Another BIG Tandy, how many of these things do you have?
                  I can't compete with you (4 - 2)

                  I have one extra memory board in the Model II, but no problems with the Gazzawatch.
                  The Model 12 has no extra memory board, but the extra RAM bank on the motherboard can de paginated, so
                  this could cause a problem.

                  Comment


                    #10
                    Originally posted by Tibs View Post
                    I have found about 75% success with one of the sellers on ebay, and they are reasonable on best offers.

                    But I like that glitch works item....looks like a good alternative if you have an open ROM socket.
                    I ordered a few DS1244 modules to dissect for my replacement board from eBay. The ones I ordered were date stamped 2015, but after taking them apart, I found them to be much older with dead batteries. Clearly relabels!

                    The SmartWatch replacement I'm working on will have a DIP ROM socket on top, so it'll work just like the original SmartWatch/NoSlotClock. The only difference is, it'll use a DS1315 (newer version of the IC) and a supercapacitor, which will provide around 2000 hours of power-off timekeeping, but recharges almost instantly when powered on and will likely never need replaced.
                    Check out The Glitch Works | My Retro Projects | Vintage Computer Services | Glitch Works Tindie Store -- Vintage Computer Kits and More

                    Comment


                      #11
                      Originally posted by Hans01 View Post
                      Hi Gazza.

                      I can't compete with you (4 - 2)

                      I have one extra memory board in the Model II, but no problems with the Gazzawatch.
                      The Model 12 has no extra memory board, but the extra RAM bank on the motherboard can de paginated, so
                      this could cause a problem.

                      But they ain't mine, I'm just the silly bunny that got stuck with them
                      and Dusty got one of the keyboards.
                      So that's one keyboard I don't have to repair

                      The software keeps an eye on port 0FFH so I'm hoping it wont cause any probs.

                      Comment


                        #12
                        Originally posted by glitch View Post
                        Working on a SmartWatch replacement here using a supercap so there's no battery to replace. It also uses Batten & Allen leadframe pins so it won't destroy single-wipe sockets. Here's the GW-1244-1, which is for the NVRAM version of the SmartWatch:
                        Full writeup here:

                        http://www.glitchwrks.com/2018/03/17/gw-1244-1

                        Currently working on a time-sensitive project for VCF East, this one shouldn't be too hard to knock out once VCF East is done though.

                        Henry Courbis has a SmartWatch replacement sold as a NoSlotClock on Reactive Micro, but I don't know if he's selling just the bare boards.
                        Drool.... please keep us in the loop when these are order able. My Tandy 1000SL one can set the time, but doesn't seem to 'tick' when it's off. So it gets the time from the last time it was set. I have another one en-route from China, but I'm 0-2 for working ones.

                        Edit: I was looking at Maxim's sheets, and there was an A-E variant, with different connections for each. I think the one for us was the E variant, which is what I've been ordering. I'm assuming yours might be compatible with the E variant? What are the differences between the 1216's and the 1244s?
                        Last edited by acadiel; April 12, 2018, 05:37 PM.

                        Comment


                          #13
                          The 1244 is a NVRAM potted module, the 1216s have a socket for either a ROM or a SRAM, depending on the revision. They both use compatible Phantom RTC chips -- the 1216 uses a through-hole version, while the 1244 is surface mount (you can see it in the article I linked, I dissected a DS1244 from China). Obviously there's no reason to make the SRAM versions with my GW-1244-1, so I'll be focusing on the ROM versions. I think I can make a single board with one or more configuration jumpers to select the ROM size/type. In any case, I'll definitely be targeting the -E variant, as my Ampro LittleBoard Z80 system uses the -E variant.
                          Check out The Glitch Works | My Retro Projects | Vintage Computer Services | Glitch Works Tindie Store -- Vintage Computer Kits and More

                          Comment


                            #14
                            Originally posted by Hans01 View Post
                            Hi Gazza.

                            Please count me in for one Model 12 board.
                            Your Model II version works fine.
                            Hans, if you still want one for the Model 12 let me know, that plus the 4 Model IIs is enough to run off one more batch of boards.
                            I'm interested to see how it runs on the Model 12 - if at all

                            Comment


                              #15
                              Originally posted by Gazza View Post
                              Hans, if you still want one for the Model 12 let me know, that plus the 4 Model IIs is enough to run off one more batch of boards.
                              I'm interested to see how it runs on the Model 12 - if at all
                              Hi Gazza.

                              Yes, I'am sure.
                              I want to try the gazza watch on my Model 12.
                              I had to replace the battery holder on the Model II version as a 2032 didn't fit in it. The pressure on the spring wasn't enough to keep it in place.
                              Let me know the total costs and I'll pay you with paypal.

                              Comment

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