Your not hearing me.
The effects would be unpredictable.
It depends on how much engineering time was spent.
It depends on how many dollars were saved by engineering short cuts
And I said due do digital data corruption. Not so much driving it at 9v or 15v, but rather insane hi frequency ripple.
So logic levels, and feedback loops go haywire
so 001110011100111001110011100111001110011100111 becomes 011110011000111001110011110111001111110011001 for example.
because instead of 0 = 0v or 1 = 5v, the CPU starts seeing 3.2V and things get confused.
The results would be unpredictable, with different devices, built by different manufactures, using different chip-sets with different designs and different tolerances
Logic voltage levels
Hobbyist frequency counter circuit built almost entirely of TTL logic chips.
Main article: logic level
The two states of a wire are usually represented by some measurement of an electrical property: Voltage is the most common, but current is used in some logic families. A threshold is designed for each logic family. When below that threshold, the wire is "low," when above "high." Digital circuits establish a "no man's area" or "exclusion zone" that is wider than the tolerances of the components. The circuits avoid that area, in order to avoid indeterminate results.
It is usual to allow some tolerance in the voltage levels used; for example, 0 to 2 volts might represent logic 0, and 3 to 5 volts logic 1. A voltage of 2 to 3 volts would be invalid, and occur only in a fault condition or during a logic level transition. However, few logic circuits can detect such a condition and most devices will interpret the signal simply as high or low in an undefined or device-specific manner. Some logic devices incorporate schmitt trigger inputs whose behaviour is much better defined in the threshold region, and have increased resilience to small variations in the input voltage.
The levels represent the binary integers or logic levels of 0 and 1. In active-high logic, "low" represents binary 0 and "high" represents binary 1. Active-low logic uses the reverse representation.
Examples of binary logic levels:
Technology | L voltage | H voltage | Notes
CMOS 0 V to VCC/2 VCC/2 to VCC VCC = supply voltage
TTL 0 V to 0.8 V 2 V to VCC VCC is 4.75 V to 5.25 V
ECL -1.175 V to -VEE 0.75 V to 0 V VEE is about -5.2 V. VCC=Ground
Bookmarks