LM8323

• 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 kHz (Fast-mode).
  • Three Host-programmable PWM Outputs Useful for Smooth LED Brightness Modulation.
  • Supports General-purpose I/O Expansion on Pins Not Otherwise Used for Keypad or Rotary Encoder Interface.
  • Key-scan Event Storage in a FIFO Buffer for up to 15 Events.
  • Key Events, Errors, and Dedicated Hardware Interrupts Request Host Service by Asserting the IRQ Output.
  • The Correct Reception of a Command May be Assumed, if No Error is Reported from the LM8323 After Receiving it.
  • Wake-up from Halt Mode on any Matrix Key-scan Event, any Use of the SF Keys, or Any Activity on the ACCESS.bus Interface, or Any Change in the Rotary Encoder Counter Value (if Enabled).
• Host-Controlled Functions
  • Three PWM Outputs
  • Period of Inactivity that Triggers Entry into Halt Mode
  • Debounce Time for Reliable Key Event Polling
  • Configuration of General-purpose I/O Ports
  • Various Initialization Options (Keypad Size, etc.)
• Key Device Characteristics
  • 1.8V ± 180 mV Single-supply Operation
  • On-chip Power-on Reset (POR)
  • Watchdog Timer
  • Dedicated Slow Clock Input for 32 kHz
  • -40°C to +85°C Industrial Temperature Range
  • 36-pin csBGA Package

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