2 layers133 × 82 mm
HD6309 computer
trcwm/HD6309-Computer
A computer based on the HD6309 CPU, done for the Retro Challenge 2017/04.
52 parts17
2 layers49 × 53 mm
Sdcard
trcwm/HD6309-Computer17A computer based on the HD6309 CPU, done for the Retro Challenge 2017/04.
- Size
- 49 × 53 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 12
- Nets
- 40
- Pads
- 91
- Tracks, vias
- 165, 20
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 30 Apr 2017
- Updated
- 23 Oct 2019
Overview
Sdcard is an open-source printed circuit board by trcwm, from the trcwm/HD6309-Computer repository on GitHub. It is a 2-layer board of 49 × 53 mm with 12 parts on 40 nets, routed with 165 tracks and 20 vias.
It is built around the 74HCT541D, 74LVX574M and LM1117-3.3. Its parts include 3 capacitors, 3 ICs, 3 connectors, 2 resistors and 1 diode. It belongs with the retro computing and games boards of this library.
Main components
3
74HCT541D
SO-20-40℃~+125℃ 1 15ns@4.5V,50pF 160uA 4.5V~5.5V 6mA 6mA 74HCT 8 Tri-State Unidirectional SO-20-300mil Buffers, Drivers, Receivers, Transceivers ROHSNexperiaBuffers, Drivers, Receivers, Transceivers
74LVX574M
SOIC-20-40℃~+85℃ 1 1.5ns 16.7ns@3.3V,50pF 2V~3.6V 3.5ns 4mA 4mA 4pF 4uA 74LVX Series 75MHz 8 D-Type Rising Edge Synchronous Tri-State SOIC-20 Flip Flops ROHSonsemiFlip Flops
LM1117-3.3
SOT-2231 1.3V@(1000mA) 15V 1A 2mA 3.3V Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHShongjiachengUncategorised
README
README.mdHD6309-Computer
A computer based on the HD6309 CPU, done for the Retro Challenge 2017/04.
Read the blog: https://namoseley.wordpress.com/category/retrochallenge/
Features:
- HD6309 CPU
- Binary compatible to MC6809
- ..but faster instruction execution,
- ..extended registers,
- ..additional instructions,
- and lots more!
- 1MB of RAM:
- mapped in 32K pages at 0x0000 .. 0x7FFF
- fixed page at 0x8000 .. 0xDFFF
- 2KB of IO space:
- SC16C550B UART at 0xE000
- 8-bit expansions port at 0xE010(untested!)
- Memory map register:
- 5-bit entry sets A15..A19 on RAM
- reg at address 0xE800
- 4KB of ROM:
- Memory check
- SREC loader
Licence: CERN Open Hardware Licence v1.2
Development time provided by: http://www.moseleyinstruments.com
Parts
12| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | 100n | Capacitor_SMD:C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C1, C2, C3 |
| 1 | 10k | Resistor_SMD:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R9 |
| 1 | 470 | Resistor_SMD:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R1 |
| 1 | 74HCT541 | Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm | U2 |
| 1 | 74LVX574 | Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm | U1 |
| 1 | Conn_01x08 | Connector_PinHeader_2.54mm:PinHeader_1x08_P2.54mm_Vertical | J1 |
| 1 | Conn_01x10 | Connector_PinHeader_2.54mm:PinHeader_1x10_P2.54mm_Vertical | J2 |
| 1 | LED_Small | LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D1 |
| 1 | LM1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U3 |
| 1 | SD_Card | Connector_Card:SD_TE_2041021 | J3 |
Questions
How big is the Sdcard PCB?
It measures 49 × 53 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Sdcard use?
12 parts, built around the 74HCT541D, 74LVX574M and LM1117-3.3. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Sdcard KiCad files?
From the trcwm/HD6309-Computer repository on GitHub, at the commit this page was made from: the board is expansion/sdcard/sdcard.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Sdcard design in my own project?
Its repository states no licence, so its author keeps all rights: ask trcwm before reusing the design.
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