Datasheet

Universal Serial Bus Module (USB)
Features
MC68HC908JB8•MC68HC08JB8•MC68HC08JT8 — Rev. 2.3 Technical Data
Freescale Semiconductor Universal Serial Bus Module (USB) 119
9.3 Features
Features of the USB module include:
• Full Universal Serial Bus Specification 1.1 low-speed functions
• 1.5 Mbps data rate
• On-chip 3.3V regulator
• Endpoint 0 with 8-byte transmit buffer and 8-byte receive buffer
• Endpoint 1 with 8-byte transmit buffer
• Endpoint 2 with 8-byte transmit buffer and 8-byte receive buffer
• USB data control logic:
– Control endpoint 0 and interrupt endpoints 1 and 2
– Packet decoding/generation
– CRC generation and checking
– NRZI (Non-Return-to Zero Inserted) encoding/decoding
– Bit-stuffing
• USB reset options:
– Internal MCU reset generation
– CPU interrupt request generation
• Suspend and resume operations, with remote wakeup support
• USB-generated interrupts:
– Transaction interrupt driven
– Resume interrupt
– End-of-packet interrupt
– USB reset
• STALL, NAK, and ACK handshake generation