? ? amri ? 5305 low power 10 touch controller no. 5, innovation road i, hsinchu science park, hsinchu, taiwan, r.o.c tel: 886-3-5795317 copyright ? ? ? pixart ? imaging ? inc. ? all ? rights ? reserved.
? ? AMRI-5305: low power 10 touch controller description a touch-screen system consists of an lcd or oled display, a touch-sensitive panel, a protective cover plate and a touch controller. the AMRI-5305 is a low-power, 10-touch controller designed specifically to provide a touch screen system with high report rate, touch accuracy, and responsive on-screen navigation, with very low latency. the ic uses a mutual- capacitance measurement technique, where it senses capacitance changes on the touch panel, and detects multiple touch points simultaneously. the AMRI-5305 touch controller is designed specifically for applications in a high-noise environment. it is robust against common-mode, display, and rf noise; thereby eliminating the need for a ground shield on the touch panel, reducing system cost. its high-density drive/sense lines support touch screens up to 5?, with 10 simultaneous touch points. a passive stylus is also supported. larger screens can also be supported where fine-cell spacing is not a priority. the low-power design is ideal for extending battery life. programmable power modes include: run mode [150 hz report rate, 5 tps] 60 mw run mode [80 hz report rate, 1 tp] 32 mw shutdown 145 w additional programmable idle/rest modes are also available. there are 30 kbytes of flash memory for pixart supplied based-line operational code storage. in addition, there are 2 kbytes of flash memory for application-specific data storage, such as saved register settings, custom ized configurations of drive/sense mapping, buttons, sliders and haptics. there is no overlap between the 30 kbytes and 2 kbytes spaces. the controller ic operates from a single 1.7 ? 2.0 v or 2.5 ? 3.6 v supply voltage, with i/o voltage from 1.6 to 3.6 v. the part is housed in a 6 x 6 x 0.55 mm 48-pin tqfn package. features ? multi-touch navigation (up to 10 points) ? support for up to 5? screen (larger depending on application) ? adjustable touch thresholds for up to 1.5 mm pmma or pc curved lens ? cover lens: up to 2 mm glass or 1.5 mm pmma ? gesture support ? buttons and sliders support ? opens/shorts test support ? internal flash for saving user settings ? 1200 dpi resolution at full screen ? greater than 200 hz configurable report rate ? fast response time: < 10 ms ? spi/i 2 c host interface ? operating temperature: -20 to +70 ? c ? haptics output, support for up to 10 waveforms, and a variety of triggers ? lead-free rohs compliant applications ? smart phones ? portable media players ? mobile internet devices (mid) ? personal navigation devices (pnd) ? tablet pc?s
? ? AMRI-5305: low power 10 touch controller figure 1: system block diagram figure 2: functional block diagram
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