LM8322 Datasheet | National Semiconductor Corporation

LM8322 Mobile I/O panion Supporting Key-Scan, I/O Expansion, PWM, and ACCESS.bus Host Interface May 2007 LM8322 Mobile I/O panion Supporting Key-Scan, I/O Expansion, PWM, and ACCESS.bus Host Interface 1.0 General Description The LM8322 Mobile I/O panion is a dedicated device to unburden a host processor from scanning a matrix-addressed keypad. In addition, the LM8322 provides general-purpose I/O expansion, and PWM outputs useful for dynamic LED brightness modulation. .. It municates with the host through an I2C-patible ACCESS.bus interface. An interrupt output is available for signaling key-press and key-release events. munication frequencies up to 400...