xr21b1411 Exar Corporation, xr21b1411 Datasheet - Page 22

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

XR21B1411
ENHANCED 1-CH FULL-SPEED USB UART
RX_FIFO_LOW_LATENCY[11:1]: Reserved
These bits are reserved and should remain ’0’.
WIDE_MODE[0]: EN
WIDE_MODE[11:1]: Reserved
These bits are reserved and should remain ’0’.
The OTP on-chip memory contents are accessible via the USB interface. For details on programming the OTP
contact [e-mail]. Note that certain memory locations are pre-programmed at the factory.
Programming any of these locations or locations not documented in the data sheet may cause permanent
functional damage to the B1411 device.
0x05 -
0x42 -
0x1FF
A
0x0C USB_VENDOR_ID_LSB
3.2
0x0B
0x00 OTP_CONFIG0
0x01 OTP_CONFIG1
0x02 OTP_CONFIG2
0x03 OTP_CONFIG3
0x04 OTP_VALID
0x10 USB_ATTRIBUTES
0x11 USB_MAXPOWER
3.1.1.28
0xD USB_VENDOR_ID_MSB
0xE
0xF
ESS
Logic 0 = Normal (7, 8 or 9 bit data) mode
Logic 1 = Wide mode - See
mode Receive” on page
DDR
LINE_CODING_0 -
LINE_CODING_6
USB_PRODUCT_ID_LSB
USB_PRODUCT_ID_MSB
ADDRESS_VALUE
OTP Memory
WIDE_MODE (Read / Write)
R
EGISTER
N
AME
6.
“Section 1.3.1.1, Wide mode Transmit” on page 6
B
FACTORY PROGRAMMED - DO NOT OVERWRITE
IT
0
0
0
-7
T
ABLE
SELF_P
OWERE
B
11: OTP M
FACTORY PROGRAMMED - DO NOT OVERWRITE
FACTORY PROGRAMMED - DO NOT OVERWRITE
IT
D
0
0
-6
22
REMOT
E_WAK
B
EUP
IT
0
0
EMORY
-5
B
IT
0
0
-4
VALUE
VALUE
VALUE
VALUE
VALUE
VALUE
VALUE
ENABLE
_VBUS_
SENSE
B
IT
0
-3
RESERVED
and
LINE_C
ODING
B
“Section 1.3.2.1, Wide
IT
CORE_CLOCK_DIV
-2
LOWPO
WER_P
OLAR-
RSVD.
B
ITY
IT
-1
REV. 1.1.0
RESER
B
VED
USB
IT
-0