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Application Processors Limit Function Expansion. Inexpensive application processors (APs) and MCUs have limited IO ASIC IOs are an expensive and risky option to expand Additional peripheral functions are a common feature upgrade. Additional Functions. MCU / Application / Baseband Processor.

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Application processors limit function expansion
Application Processors Limit Function Expansion

  • Inexpensive application processors (APs) and MCUs have limited IO

  • ASIC IOs are an expensive and risky option to expand

  • Additional peripheral functions are a common feature upgrade

Additional Functions

MCU / Application /BasebandProcessor

LEDs

WiFi

IO ConstrainedProcessor

Bluetooth

GPS

PeripheralControl

FM

Other

I2C, SPI, parallel, etc


Lattice pld for flexible led drive interfacing
Lattice PLD for Flexible LED Drive Interfacing

  • Lattice PLD is the host for popular on-board interfaces (I2C, SPI, local bus, proprietary, etc)

  • Best IO density for price

  • Integrates voltage level shifting and glue logic

Serial Interface

Backlight /ContrastControl ASIC or

ASSP

Lattice PLD

Voltage

Level Shift

GPIOExpansion

ConstantCurrentLED Drive

IC

Slave

Interface

Serial Bus Driver

Peripheral

Interface

I2C,SPI orProprietary Interface


Proposed led driver eval board with lattice pld
Proposed LED driver eval board with Lattice PLD

  • Lattice PLD is the host for popular interfaces (I2C, SPI, local bus, proprietary, etc)

  • Customer could program PLD with their own interface to test LED driver and/or Lattice could supply example program files for I2C & SPI and typical 59401 i/f

  • This board allows a customer to implement many LED interfaces for TLC59401 or other

Could daisy chain to another board or have more LED drivers

Serial Interface

Lattice PLD

On board

Oscillator for default timing

GPIOExpansion

TLC59401LED Drive

IC

I2C, SPI or other i/f

Serial Bus Driver

Could be one or several connectors / headers