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XR22804 Fiches technique(PDF) 21 Page - Exar Corporation

No de pièce XR22804
Description  Hi-Speed USB to 10/100 Ethernet Bridge with 4 UARTs
PDF  47 Pages
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Fabricant  EXAR [Exar Corporation]
Site Internet  http://www.exar.com
Logo EXAR - Exar Corporation

XR22804 Fiches technique(HTML) 21 Page - Exar Corporation

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XR22804
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exar.com/XR22804
Rev 1B
UART Register Descriptions
Note that all register reset default values are ’0’ unless otherwise specified. All registers are 16 bits.
UART_ENABLE (0x040) - Read/Write
FORMAT (0x045) - Read/Write
Note that the CDC_SET_LINE_CODING command may be used to set the UART data format in addition to this registers.
0x060
TX_FIFO_RESET
0
0
0
0
0
0
0
RST
0x061
TX_FIFO_FILL (MSB)
0
0
0
0
FILL[10:8]
TX_FIFO_FILL (LSB)
FILL[7:0]
0x062
TX_WIDE_MODE
0
0
0
0
0
0
0
EN
0x063
RX_FIFO_RESET
0
0
0
0
0
0
0
RST
0x064
RX_FIFO_FILL (MSB)
0
0
0
0
0
FILL[10:8]
RX_FIFO_FILL (LSB)
FILL[7:0]
0x065
RX_WIDE_MODE
0
0
0
0
0
0
0
EN
0x066
RX_CONTROL
0
0
0
0
0
0
MAX_
PKT_-
SIZE
LOW_
LATEN
CY
0x067
FLOW_THRESHOLD (MSB)
0
0
0
0
0
THRESH [10:8]
FLOW_THRESHOLD (LSB)
THRESH [7:0]
Miscellaneous Registers
0x081
CUSTOM_DRIVER
0
0
0
0
0
0
0
ACTIVE
Bit
Default
Description
15:2
0x0000
Reserved
These bits are reserved and should be written as ‘0’.
10
RX
0: Disable UART RX
1: Enable UART RX
00
TX
0: Disable UART TX
1: Enable UART TX
Bit
Default
Description
15:8
0x00
Reserved
These bits are reserved and should be written as ‘0’.
Table 5: XR22804 Register Map
Address
Register Name
Bit 7
(15)
Bit 6
(14)
Bit 5
(13)
Bit 4
(12)
Bit 3
(11)
Bit 2
(10)
Bit 1
(9)
Bit 0
(8)



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