_hw_usb_token Union Reference

HW_USB_TOKEN - Token register (RW) More...

#include <MK64F12_usb.h>

Detailed Description

HW_USB_TOKEN - Token register (RW)

Reset value: 0x00U

Used to initiate USB transactions when in host mode (HOSTMODEEN=1). When the software needs to execute a USB transaction to a peripheral, it writes the TOKEN type and endpoint to this register. After this register has been written, the USB module begins the specified USB transaction to the address contained in the address register. The processor core must always check that the TOKEN_BUSY bit in the control register is not 1 before writing to the Token Register. This ensures that the token commands are not overwritten before they can be executed. The address register and endpoint control register 0 are also used when performing a token command and therefore must also be written before the Token Register. The address register is used to select the USB peripheral address transmitted by the token command. The endpoint control register determines the handshake and retry policies used during the transfer.

Definition at line 2520 of file MK64F12_usb.h.