Freescale Semiconductor MC68HC08KH12 - Manual (Page 114)

Advance Information MC68HC(7)08KH12 — Rev. 1.1
114 Freescale Semiconductor
9.2 Features
Features of the general USB Module include the following:
• Integrated 3.3 Volt Regulator with 3.3V Output Pin REGOUT
• Integrated USB transceiver supporting both full speed and low
speed functions
• USB Data Control Logic
– Packet decoding/generation
– CRC generation and checking
– NRZI encoding/decoding
– Bit stuffing/de-stuffing
• USB reset support
• Suspend and resume operations
– Remote Wakeup support
• STALL, NAK, and ACK handshake generation
Features of the HUB function include the following:
• HUB Control Endpoint 0
– 8-byte transmit buffer
– 8-byte receive buffer
• HUB Interrupt Endpoint 1
– 1-byte transmit buffer
• USB interrupts
– transaction interrupt driven
– Start of Frame interrupt
– EOF2 interrupt
– End of Packet interrupt
– Signal transition interrupt
– Frame timer locked interrupt
• HUB repeater and controller function
– downstream and upstream connectivity
– bus state evaluation
– selective reset, suspend and resume
– fault condition hardware detection