IS32LT3134数据手册Lumissil中文资料规格书

描述 Description

IS32LT3134 is a 12-channel LED driver with an embedded animation controller. Multiple IS32LT3134’s can be cascaded in the same board design. Four animation patterns, pin-selectable, can be stored in the embedded Flash of each device. The patterns are played by a host controlling the input pins of the devices. For each pattern, two modes can be predefined: cascade mode, one device after the other; synchronous mode, all devices simultaneously.

IS32LT3134 is provided with a GUI on Windows PC for design and playback of the animation patterns when connected to a Lumissil evaluation board or a customer designed board with IS32LT3134. An In- System-Programming (“ISP”) mode is provided for programming patterns into individual device when the ISP pin is asserted. A security code can be added so patterns in the device cannot be retrieved without the correct security code. GUI also provides a tool to automatically detect device position and assign device address when more than one IS32LT3134’s is on the same board.

The watchdog timer (WDT) is used to check if the animation sequence reaches the end of the pattern in anticipated time and if the clock signal is functioning correctly. If either fails, the Fault pin will be asserted in one of the two selectable rules: “one fails, all fail” or “one fails, others continue

IS32LT3134 is available in WFQFN-24 package. It operates from 3.0V to 5.5V over the temperature range of -40°C to +125°C.

特性 Features

• Supply voltage range: 3.0V to 5.5V
• UART interface operating at 19.2K supports dynamic addressing mode
• 12-channel push-pull outputs driver for common anode, common cathode, or multiplexed LED drive modes
• Duration of animation is from 0.1s up to 15s
• User programmable internal clock pre-scalar
• Four pattern banks each with 12KB Flash
• Watchdog timer to monitor valid clock signals and end of animation pattern; Fault is asserted when errors detected by the WDT
• Animation end pin signaling the end of a synchronous pattern for all devices, a start of animation of the next cascading device or the end of cascading pattern if it’s asserted by the last device in the row.
• Support programmable duty cycle for dimming
• Programmable clock frequency by deriving from 16MHz internal oscillator with
• Clock input for external clock option
• WFQFN-24 package

应用 Application

• Taillight animation module with digital interface
• Interior light animation module with digital interface