LM8333 Datasheet - National Semiconductor

LM8333, Keypad Controller

www.DataSheet4U.com LM8333 Keypad Controller with I/O Expansion and ACCESS.bus Host Interface September 2006 LM8333 Keypad Controller with I/O Expa.
The LM8333 is a general-purpose controller for matrixaddressed keypads which provides an ACCESS.

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Datasheet Details

Part number:

LM8333

Manufacturer:

National Semiconductor

File Size:

946.73 KB

Description:

Keypad Controller

Features

* n 8 x 8 standard keys n 8 special function keys (SF keys) providing a total of 72 keys for the maximum keyboard matrix n ACCESS. bus (I2C-compatible) communication interface to the host n Four general purpose host programmable I/O pins with two optional (slow) external Interrupts n 16 byte FIFO buffe

Applications

* such as cellphones, PDAs, games, and other handheld applications. Key press and release events are encoded into a byte format and loaded into a FIFO buffer for retrieval by the host processor. An interrupt output (IRQ) is used to signal events such as keypad activity, a state change on either of two

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LM8333 Keypad Controller National Semiconductor

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