List of Errata and Addenda
From Spare Time Gizmos' Wiki
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* In the Elf 2K manual, 6th Edtion dated 10/1/2006 4:23 PM, there is an IC missing from the parts list for the Hex keypad - U5 a CD4001 (a quad 2 input NOR gate IC) needs to be added. Also U1 is a 74C922 not "74C9222" as in the parts list. | * In the Elf 2K manual, 6th Edtion dated 10/1/2006 4:23 PM, there is an IC missing from the parts list for the Hex keypad - U5 a CD4001 (a quad 2 input NOR gate IC) needs to be added. Also U1 is a 74C922 not "74C9222" as in the parts list. | ||
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[[Elf_2000|Elf 2000 Main Page]] | [[Elf_2000|Elf 2000 Main Page]] | ||
Revision as of 09:06, 12 February 2012
Contents |
Elf 2000 Main Board
- DS1210 VBAT2 grounding issue
- On the Elk2K main board, chip U5, the DS1210, MUST have pin 7, VBAT2, tied to ground (Pin 4).
- http://groups.yahoo.com/group/sparetimegizmos/message/4258
- http://groups.yahoo.com/group/cosmacelf/message/8644
- DS1210 datasheet PDF: http://www.jameco.com/Jameco/Products/ProdDS/114198.pdf
STG1861 Board
Disk/UART/RTC/NVR Board
- There is a minor errata on the Disk/UART/RTC/NVR Board. On U7, the 16C450 UART, pin 36 /CTS is an input which is not connected to anything. As far as I can tell from the datasheet this IC does not have pullups fitted so this pin should be connected to something. On my board I have run a wire from /RTS pin 32 to /CTS pin 36.
Hexadecimal Keypad
- In the Elf 2K manual, 6th Edtion dated 10/1/2006 4:23 PM, there is an IC missing from the parts list for the Hex keypad - U5 a CD4001 (a quad 2 input NOR gate IC) needs to be added. Also U1 is a 74C922 not "74C9222" as in the parts list.
