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STD 2M-NVRAM to 512K (NV)RAM / EEPROM Adapter

License: Public Domain

Mode: Editors' pick

Cloned from TL866 DS1270 Adapter

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Update time: 2020-09-30 17:18:56
Creation time: 2020-08-30 17:14:56
Description
**DS1270 / bq4017 to 32pin SRAM or EEPROM Adapter** **TESTED & WORKING WITH TL866** Added to jlcpcb order ``` Use DS-1270 / bq4017 - 16M (2Mx8) 512K at a time as a 4M (512Kx8) RAM - AS6c4008 (etc) or EEPROM - 39sf040 or 29f400 (etc) ``` **JUMPERS** ``` A19 / A20 A19-L A20-L = Bank 0 (000000h to 07FFFFh) A19-H A20-L = Bank 1 (080000h to 0FFFFFh) A19-L A20-H = Bank 2 (100000h to 17FFFFh) A19-H A20-H = Bank 3 (180000h to 1FFFFFh) RAM / EEPROM 1-2 Write Enable 3-4 Write Disable 5-6 7-9 8-10 RAM 5-7 6-8 9-10 EEPROM ``` **BOM** ``` 1 x 40pin ZIF 2 x 3pin Male Headers 2 x 5pin Male Headers 2 x 16pin 2.54mm Machine pin header male to male ``` **Construction** ``` THIS MUST BE DONE BEFORE THE ZIF socket is installed 2 x 16pin 2.54mm Machine pin headers in the bottom of the board, in the 32pin DIP location Solder on the top side of the board. Installing ZIF socket, the 2 x 5pin and the 2 x 3pin headers on top side of board Solder on the bottom side of the board. ``` **For Use as a TL866 DS1270 / bq4017 Adapter** ``` Load a DS-1270 / bq4017 - 16M (2Mx8), 512K at a time with TL866 set for DS1250 - 4M (512Kx8) Jumpers Location in 16M A19-L A20-L = 000000h to 07FFFFh (512K Bank 0) A19-H A20-L = 080000h to 0FFFFFh (512K Bank 1) A19-L A20-H = 100000h to 17FFFFh (512K Bank 2) A19-H A20-H = 180000h to 1FFFFFh (512K Bank 3) ```
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