Descriptions:
MAX7219 is an integrated serial input / output common-cathode display drivers, which drivers that interface microprocessors (µPs) to 7-segment numeric
LED displays of up to 8 digits, bar-graph displays, or 64 individual LEDs. Includes an on-chip a BCD code-B decoder, multi-channel scanning loop,
segment and digit drivers, but also a 8×8 static RAM that stores each data. Only one external register is used to set the current of each LED segment.
The MAX7221 is compatible with SPI, QSPI, and MICROWIRE, and has slew-rate-limited segment drivers to reduce EMI.
The MAX7219 chipset supports a serial 16-bit register/data buffer which is clocked in on pin DIN every time the clock edge falls,
and clocked out on DOUT 16.5 clock cycles later.
The entire device includes a 150µA low-power shutdown mode, analog and digital brightness control, a scan-limit register allows
the user to display 1-8 bit data, there is an all LED light detection mode.
