MPR081

Freescale Semiconductor Technical Data MPR081 Rev 0, 06/2007 Touch Pad Controller The MPR081 is a user interface controller which manages a 16-position rotary touch pad. The MPR081 uses an I2C interface to communicate with the host, which configures the operation, and an interrupt to advise the host of status changes. The interrupt output, IRQ, indicates that rotary status has changed since the www.datasheet4u.com MPR081 was last read. The maximum interrupt frequency can be limited to sacrifice system response time in favor of power consumption for systems that wake up out of sleep to respond to interrupts. Features 1.8 V to 3.6 V operation 150 µA average supply current (all touch pads being monitored) 1 µA standby current Supports a 16-position rotary interface Proprietary false touch rejection technology Ongoing pad analysis and detection not reset by EMI events Rotary data changes are delivered from a FIFO for shortest access time IRQ output advises when FIFO has data System can set interrupt behavior as immediate after event, or program a minimum time between successive interrupts Current rotary position is always available on demand for polling-based systems Sounder drive provides audible feedback to simulate mechanical key clicks Digital output (I2C with custom addressing) 16-pin QFN and TSSOP packages -40°C to +85°C operating temperature range Control Panels Switch Replacements Rotary and Linear Sliders Touch Pads Appli...