MC68HC908LD64 Datasheet, PDF (189/362 Pages) Freescale Semiconductor, Inc – Microcontrollers

Universal Serial Bus Module (USB)
I/O Pins
– 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
Features of the embedded device function include the following:
• Device control endpoint 0
– 8-byte transmit buffer
– 8-byte receive buffer
• Device interrupt endpoints 1 and 2
– 8-byte transmit buffer
• USB generated interrupts
– transaction interrupt driven
14.4 I/O Pins
The USB module uses ten I/O pin (five pairs), with two dedicated pins for
the upstream port pair and eight shared port I/O pins for the downstream
ports. The full name of the USB I/O pins are listed in Table 14-1. The
generic pin name appear in the text that follows.
MC68HC908LD64 — Rev. 3.0
Freescale Semiconductor
Universal Serial Bus Module (USB)
Data Sheet
189