LM8322 Datasheet - National Semiconductor Corporation

LM8322 Mobile I/O Companion Supporting Key-Scan

The LM8322 Mobile I/O Companion 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. www.DataSheet4U.com It communicates with the host .

LM8322 Features

* Key Features

* Supports keypad matrices of up to 8 × 12 keys plus 8 special-function (SF) keys for a total of 104 keys. SF keys pull keypad scan inputs directly to ground, rather than connecting to a keypad scan output.

* Supports I2C-compatible ACCESS.bus interface in slave mode up to 400 k

LM8322_NationalSemiconductorCorporation.pdf