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Ram

lorenzonotaro·lncpu·v1/kicad/ram/ram.kicad_pcb

Ram PCB layout, top view — open source board by lorenzonotaro
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About the Ram PCB

Ram is an open source PCB design by lorenzonotaro, published on GitHub. It is a 2-layer board measuring 82.8 × 81 mm, with 11 components from 9 distinct parts.

Other key parts include the AS6C6264-55PCN, 74HCT32, 74HCT245, 74HCT08 and LNCPU Type A Header. By type, the board carries 6 capacitors and 5 ICs.

From the project

v1 is the current implementation of the lncpu.

v1 is the current implementation of the lncpu.

The clock cycle is divided in two phases: Φ1 (control phase) and Φ2 (data phase).

During Φ1, the data bus contains the contents of [CS:PC]: only the device mapped to the memory section containing address CS:PC` is allowed to write to the data bus, regardless of control signals.

* During Φ2, bus control is determined by the control signals of the current microinstruction.

Ram, from the project README
From the project README

Main components on the Ram

AS6C6264-55PCN74HCT3274HCT24574HCT08LNCPU Type A Header

Ram bill of materials (BOM)

11 components, 9 distinct parts.

QtyPartRefs
1
AS6C6264-55PCN
IC1
1
74HCT32
U1
1
74HCT245
U2
1
74HCT08
U3
1
LNCPU Type A Header
U4
2
220n
C1, C4
1
47u
C2
1
1u
C3
2
100n
C5, C6

Ram design files

The KiCad project lives in the lorenzonotaro/lncpu repository on GitHub; these links point at the commit this page was built from.

Ram: common questions

How big is the Ram PCB?

The Ram measures 82.8 × 81 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Ram?

11 components, from 9 distinct parts. The full bill of materials is listed on this page.

Where can I download the Ram design files?

From the lorenzonotaro/lncpu repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Ram design in my own project?

The repository has no license, so all rights stay with lorenzonotaro. Use it as a reference, and ask the author before reusing the design.

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