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WP-2 IC-Card MRAM

bkw777·WP-2_IC-Card·PCB/WP-2_IC-Card_MRAM.kicad_pcb

WP-2 IC-Card MRAM PCB layout, top view — open source board by bkw777
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About the WP-2 IC-Card MRAM PCB

WP-2 IC-Card MRAM is an open source PCB design by bkw777, published on GitHub under the Custom license license. It is a 2-layer board measuring 54 × 54 mm, with 26 components from 8 distinct parts.

Other key parts include the MR2A08ACYS35, MIC5318-3.3YD5 and 74LVCH8T245PW,118. By type, the board carries 12 capacitors, 6 ICs, 5 resistors, 1 connector, 1 switch and 1 diode.

It belongs with the dev boards & breakouts designs in this gallery.

From the project

IC Cards for TANDY WP-2

The TANDY WP-2 and other clones of the Citizen CBM-10WP have an expansion slot that accepts "IC Cards".

Here are a few different cards to fit that slot.

A battery-backed SRAM card like the original cards A non-volatile MRAM card, a RAM card that doesn't need a battery A ROM card, there is new software that runs from a rom card but no known images of any old original rom cards A programming adapter that can read and write both the RAM and ROM cards outside of the WP-2 * A bus-tap/breakout card to allow connecting the bus to a breadboard or logic analyser etc

WP-2 IC-Card MRAM, from the project README
From the project README

Main components on the WP-2 IC-Card MRAM

MR2A08ACYS35MIC5318-3.3YD574LVCH8T245PW,118

WP-2 IC-Card MRAM bill of materials (BOM)

26 components, 8 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
MR2A08ACYS35
MRxA08xxYSxxx
U1
1
MIC5318-3.3YD5
U2
4
74LVCH8T245PW,118
LVCH8T245
U3, U4, U5, U6
1
SMS-138-01-G-S
J1
1
CUS-14TB
CUS-14B
SW1
1
TBAW56,LM
BAW56
D1
12
CL21A105KBCLNNC
1u
C1, C2, C3, C4, C5, C6, C7, C8 +4
5
RMCF0805FT200K
200k
R1, R2, R3, R4, R5

WP-2 IC-Card MRAM design files

The KiCad project lives in the bkw777/WP-2_IC-Card repository on GitHub; these links point at the commit this page was built from.

WP-2 IC-Card MRAM: common questions

How big is the WP-2 IC-Card MRAM PCB?

The WP-2 IC-Card MRAM measures 54 × 54 mm, has 2 copper layers and is 1.2 mm thick.

How many components are on the WP-2 IC-Card MRAM?

26 components, from 8 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the WP-2 IC-Card MRAM design files?

From the bkw777/WP-2_IC-Card repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the WP-2 IC-Card MRAM design in my own project?

It is published under Custom license, which limits how it may be reused; read the license before building on it.

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