xr21b1411 Exar Corporation, xr21b1411 Datasheet - Page 24

• Manufacturer Part Number: xr21b1411
• Description: Enhanced 1-ch Full-speed Usb Uart
• Manufacturer: Exar Corporation

XR21B1411
ENHANCED 1-CH FULL-SPEED USB UART
These bits are reserved and should remain ’0’.OTP Valid (Read / Write OTP)
This register holds the VALID flag for the OTP override values. These include the USB device and
configuration descriptor overrides and default line coding overrides.
OTP_VALID[0]: USB
OTP_VALID[1]: Reserved
OTP_VALID[2]: Line_Coding
OTP_VALID[7:3]: Reserved
LINE_CODING0-6[7:0]: Value
The contents of this field have the same format as that used in the CDC-ACM SET_LINE_CODING request. It
allows the default baud rate and character format to be overridden.
USB_VENDOR_ID_LSB[7:0]: Value
Bits [7:0] of the USB vendor ID reported with the descriptors. If OTP_VALID.USB is set to 0, then the Exar
vendor ID is reported instead.
USB_VENDOR_ID_MSB[7:0]: Value
Bits [15:8] of the USB vendor ID reported with the descriptors. If OTP_VALID.USB is set to 0, then the Exar
vendor ID is reported instead.
USB_PRODUCT_ID_LSB[7:0]: Value
Bits [7:0] of the USB product ID reported with the descriptors. If OTP_VALID.USB is set to 0, then the Exar
product ID is reported instead.
USB_PRODUCT_ID_MSB[7:0]: Value
Bits [15:8] of the USB product ID reported with the descriptors. If OTP_VALID.USB is set to 0, then the Exar
product ID is reported instead.
3.2.1.5
3.2.1.6
3.2.1.7
3.2.1.8
3.2.1.9
3.2.1.10
Set this bit to indicate that the USB device and configuration descriptors have selected fields overwritten by
OTP data.
This bit is reserved and should remain ’1’
Set this bit to indicate that the power up line coding (baud rate, stop bits, parity) are overwritten by OTP data.
These bits are reserved and should remain ’0’
OTP _Valid (Read / Write OTP)
Line Coding0-6 (Read / Write OTP)
USB_VENDOR_ID_LSB (Read / Write OTP)
USB_VENDOR_ID_MSB (Read / Write OTP)
USB_PRODUCT_ID_LSB (Read / Write OTP)
USB_PRODUCT_ID_MSB (Read / Write OTP)
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