File:PSG for ZX81+35 REV 1.4.pdf: Difference between revisions
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(revised version with resistor dividers between PSG and SD-card slot to convert 5V PSG levels to 3V3 SD-card levels, datalines are pulled up clock and latch lines not (pulled low by resistor divider).) |
(Mahjongg uploaded a new version of File:PSG for ZX81+35 REV 1.4.pdf) |
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Revision as of 22:28, 24 July 2016
revised version with resistor dividers between PSG and SD-card slot to convert 5V PSG levels to 3V3 SD-card levels, datalines are pulled up clock and latch lines not (pulled low by resistor divider).
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| Date/Time | Dimensions | User | Comment | |
|---|---|---|---|---|
| current | 22:28, 24 July 2016 | (23 KB) | Mahjongg (talk | contribs) | corrected resistor values, so that SD can actually pull down level on PSG below logic low level of PSG. |
| 21:08, 24 July 2016 | (23 KB) | Mahjongg (talk | contribs) | revised version with resistor dividers between PSG and SD-card slot to convert 5V PSG levels to 3V3 SD-card levels, datalines are pulled up clock and latch lines not (pulled low by resistor divider). |
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