Rainbow Electronics W90N740 - Manual (Page 7)

W90N740
Publication Release Date: November 26, 2004
- 3 - Revision A4
USB Host Controller
• USB 1.1 compatible
• Open Host Controller Interface (OHCI) 1.0 compatible.
• Supports both low-speed (1.5 Mbps) and full-speed (12Mbps) USB devices.
• Built-in DMA for real-time data transfer
UART
• One UART (serial I/O) blocks with interrupt-based operation
• Full set of MODEM control functions (CTS, RTS, DSR, DTR, RI and DCD)
• Fully programmable serial-interface characteristics:
• Break generation and detection
• False start bit detection
• Parity, overrun, and framing error detection
• Full prioritized interrupt system controls
Timers
• Two programmable 24-bit timers with 8-bit pre-scalar
• One programmable 24-bit Watch-Dog timer
• One-short mode, period mode or toggle mode operation
Programmable I/Os
• 21 programmable I/O ports
I
• /O ports Configurable for Multiple functions
Advanced Interrupt Controller (AIC)
• 18 interrupt sources, including 4 external interrupt sources
• Programmable normal or fast interrupt mode (IRQ, FIQ)
• Programmable as either edge-triggered or level-sensitive for 4 external interrupt sources
• Programmable as either low-active or high-active for 4 external interrupt sources
• Priority methodology is encoded to allow for interrupt daisy-chaining
• Automatically mask out the lower priority interrupt during interrupt nesting
GPIO Controller
• Programmable as an input or output pin