NXP Semiconductors KL25 Series - OTG Status Register (Usbx_Otgstat)

USBx_OTGICR field descriptions (continued)
Field Description
0 Disables the B_SESS_CHG interrupt.
1 Enables the B_SESS_CHG interrupt.
1
Reserved
This field is reserved.
This read-only field is reserved and always has the value 0.
0
AVBUSEN
A VBUS Valid Interrupt Enable
0 Disables the AVBUSCHG interrupt.
1 Enables the AVBUSCHG interrupt.
35.4.7 OTG Status register (USBx_OTGSTAT)
Displays the actual value from the external comparator outputs of the ID pin and VBUS.
Address: 4007_2000h base + 18h offset = 4007_2018h
Bit 7 6 5 4
Read
ID ONEMSECEN LINESTATESTABLE
0
Write
Reset
0 0 0 0
Bit
3 2 1 0
Read
SESS_VLD BSESSEND
0
AVBUSVLD
Write
Reset
0 0 0 0
USBx_OTGSTAT field descriptions
Field Description
7
ID
Indicates the current state of the ID pin on the USB connector
0 Indicates a Type A cable is plugged into the USB connector.
1 Indicates no cable is attached or a Type B cable is plugged into the USB connector.
6
ONEMSECEN
This bit is reserved for the 1ms count, but it is not useful to software.
5
LINESTATESTABLE
Indicates that the internal signals that control the LINE_STATE_CHG field of OTGISTAT are stable for
at least 1 millisecond. First read LINE_STATE_CHG field and then read this field. If this field reads as
1, then the value of LINE_STATE_CHG can be considered stable.
0 The LINE_STAT_CHG bit is not yet stable.
1 The LINE_STAT_CHG bit has been debounced and is stable.
4
Reserved
This field is reserved.
This read-only field is reserved and always has the value 0.
3
SESS_VLD
Session Valid
0 The VBUS voltage is below the B session valid threshold
1 The VBUS voltage is above the B session valid threshold.
Table continues on the next page...
Chapter 35 Universal Serial Bus OTG Controller (USBOTG)
KL25 Sub-Family Reference Manual, Rev. 3, September 2012
Freescale Semiconductor, Inc. 627