USBx_CTL field descriptions (continued)
Field
Description
When host mode is enabled, clearing this bit causes the SIE to stop sending SOF tokens.
0 Disables the USB Module.
1 Enables the USB Module.
42.4.15 Address register (USBx_ADDR)
Holds the unique USB address that the USB module decodes when in Peripheral mode
(HOSTMODEEN=0). When operating in Host mode (HOSTMODEEN=1) the USB
module transmits this address with a TOKEN packet. This enables the USB module to
uniquely address any USB peripheral. In either mode, CTL[USBENSOFEN] must be 1.
The Address register is reset to 0x00 after the reset input becomes active or the USB
module decodes a USB reset signal. This action initializes the Address register to decode
address 0x00 as required by the USB specification.
Address: 4007_2000h base + 98h offset = 4007_2098h
Bit
7
6
5
4
3
2
1
0
Read
Write
Reset
0
0
0
0
0
0
0
0
USBx_ADDR field descriptions
Field
Description
7
LSEN
Low Speed Enable bit
Informs the USB module that the next token command written to the token register must be performed at
low speed. This enables the USB module to perform the necessary preamble required for low-speed data
transmissions.
6–0
ADDR
USB Address
Defines the USB address that the USB module decodes in peripheral mode, or transmits when in host
mode.
Memory map/Register definitions
K22F Sub-Family Reference Manual , Rev. 3, 7/2014
1014
Freescale Semiconductor, Inc.
Содержание MK22FN256VDC12
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