Frame Consistency in Embedded LED Systems Why hardware drivers like MAX7219 don’t solve the real problem Introduction After working on a 74HC595-based display driver (QUAD7SHIFT), one pattern became increasingly clear: Most display “flicker problems” are not hardware problems. They are frame consistency problems in firmware. In the first part of this series, the focus was on shift registers and latch timing. This part generalizes the model to hardware drivers such as the MAX7219. 1. The misconception: “better hardware fixes flicker” When engineers move from 74HC595-based designs to dedicated drivers like MAX7219, the expectation is usually: no flicker no ghosting no timing issues And in many cases, this appears to be true. But the reasoning is incomplete. Because what actually changes is not the software model — it is the hardware abstraction layer. 2.…