Difference between revisions of "LB-68B50-01"
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Blwikiadmin (talk | contribs) (→Rev 2) |
Blwikiadmin (talk | contribs) (→Rev 1) |
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** Jumper U2-11 to U2-4 | ** Jumper U2-11 to U2-4 | ||
** Jumper U2-10 to U2-5 | ** Jumper U2-10 to U2-5 | ||
| − | * Cut | + | * Cut etch U1-8 |
| − | * Cut | + | * Cut etch U1-10 |
* Add jumper U1-8 to U1-10 to U1-12 | * Add jumper U1-8 to U1-10 to U1-12 | ||
| + | * Cut etch U1-14 (E pin of ACIA) | ||
| + | * Add jumper U1-14 to J1-49 (VDA) | ||
== Assembly Sheet == | == Assembly Sheet == | ||
* [https://land-boards.com/LB-68B50-01/LB-68B50-01_Rev1_ibom.html Interactive BOM] | * [https://land-boards.com/LB-68B50-01/LB-68B50-01_Rev1_ibom.html Interactive BOM] | ||
Revision as of 22:00, 19 August 2024
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Contents
Features
- Serial/Parallel I/O Card
- 68B50 UART
- 1.8432 MHz oscillator
- Baud Rate Clock (38.4k baud oscillator)
- XIAO RP2040 CPU
- USB/Serial
- 8-bit parallel port expander
- SD card
- 100x50mm card
Design
ACIA
- 68B50 UART
- Baud Rate Clock (38.4k baud oscillator)
XIAO RP2040 CPU
- USB/Serial
- Drive SPI I2C 8-bit parallel port expander
- SD card
Parallel I/O Port
- 3.3V levels
SD Card (Rev 2)
SD Card (Rev1)
- Need to not install level translators
- Need to short across the SD card lines
Backplane
Mechanicals
Rev 2
- Move J3 GND, VCC silkscreen over
Rev 1
Checkout
Rev 2
- Removed U2 voltage translator
- Lift pin U1-8
- Lift pin U1-10
- Connect U1-8 to U1-10 to Vcc
Rev 1
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- Do not install level translator U3
- Short across the SD card lines
- Jumper U2-13 to U2-2
- Jumper U2-12 to U2-3
- Jumper U2-11 to U2-4
- Jumper U2-10 to U2-5
- Cut etch U1-8
- Cut etch U1-10
- Add jumper U1-8 to U1-10 to U1-12
- Cut etch U1-14 (E pin of ACIA)
- Add jumper U1-14 to J1-49 (VDA)
