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Sp register

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

Sp register PCB layout, top view — open source board by lorenzonotaro

About the Sp register PCB

Sp register is an open source PCB design by lorenzonotaro, published on GitHub. It is a 2-layer board measuring 101.5 × 66.5 mm, with 12 components from 9 distinct parts.

Other key parts include the LNCPU Type B Connector, 74LS169, 74HCT541 and 74HCT00. By type, the board carries 6 capacitors, 5 ICs and 1 connector.

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.

Sp register, from the project README
From the project README

Main components on the Sp register

LNCPU Type B Connector74LS16974HCT54174HCT00

Sp register bill of materials (BOM)

12 components, 9 distinct parts.

QtyPartRefs
1
LNCPU Type B Connector
U1
2
74LS169
U2, U3
1
74HCT541
U4
1
74HCT00
U5
1
OP_{out}
J1
3
100n
C1, C2, C4
1
220n
C3
1
47uF
C5
1
1uF
C6

Sp register design files

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

Sp register: common questions

How big is the Sp register PCB?

The Sp register measures 101.5 × 66.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Sp register?

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

Where can I download the Sp register 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 Sp register 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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