# Dallas DS12887/DS12C887 CR2032 battery mod

The modification is fairly simple but can be done in two ways. When I
performed this mod I exposed only pin 20, for the positive feed, and
cut a groove into the casing at pin 12, to expose a little of the pin
shoulder to solder the negative lead to[1].

Most mods I've seen done have used pins 20 and 16, with the CR2032
battery holder I had it seemed tidier to use pin 12, YMMV.


## Pinout

                         --------
                   MOT [|1  V  24|] Vcc
                    NC [|2     23|] SQW
                    NC [|3     22|] NC
                   AD0 [|4     21|] RCLR
                   AD1 [|5     20|] NC =========== +
                   AD2 [|6     19|] IRQ
                   AD3 [|7     18|] RESET
                   AD4 [|8     17|] DS
                   AD5 [|9     16|] NC =========== -
                   AD6 [|10    15|] R/W
                   AD7 [|11    14|] AS
                   GND [|12    13|] CS
                         --------

[1](gopher://gopher.icu/I/images/dallas-ds12887-cr2032-battery-mod.jpg)

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