Rainbow-electronics W90P710CDG Instrukcja Użytkownika Pobierz pdf (Strona 9)

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W90P710CD/W90P710CDG

Publication Release Date: September 19, 2006

- 9 - Revision B2

Advanced Interrupt Controller

y 31 interrupt sources, including 6 external interrupt sources

y Programmable normal or fast interrupt mode (IRQ, FIQ)

y Programmable as either edge-triggered or level-sensitive for 6 external interrupt sources

y Programmable as either low-active or high-active for 6 external interrupt sources

y Priority methodology is encoded to allow for interrupt daisy-chaining

y Automatically mask out the lower priority interrupt during interrupt nesting

USB Host Controller

y USB 1.1 compliant

y Compatible with Open HCI 1.0 specification

y Supports low-speed and full speed devices

y Build-in DMA for real time data transfer

y Two on-chip USB transceivers with one optionally shared with USB Device Controller

USB Device Controller

y USB 1.1 compliant

y Support four USB endpoints including one control endpoint and 3 configurable endpoints for rich

USB functions

Two PLLs

y The external clock can be multiplied by on-chip PLL to provide high frequency system clock

y The input frequency range is 3-30MHz; 15MHz is preferred.

y One PLL for both CPU and USB host/device controller

y One PLL for LCD pixel clock and audio IIS 12.288/16.934MHz clock source

y Programmable clock frequency

Real Time Clock (RTC)

y 32.768KHz operation

y Time counter (second, minute, hour) and calendar counter (day, month, year)

y Alarm register (second, minute, hour, day, month, year)

y 12 or 24-hour mode selectable

y Recognize leap year automatically

y Day of the week counter

y Frequency compensate register (FCR)

y Beside FCR, all clock and alarm data expressed in BCD code

y Support tick time interrupt

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