XR22801 Datasheet, PDF (21/42 Pages) Exar Corporation – Hi-Speed USB to 10/100 Ethernet Bridge

XOFF_CHAR (0x048) - Read/Write
Bit
15:8
7:0
Default
Description
0x00
Reserved
These bits are reserved and should be written as ‘0’.
0x13
Char
XOFF ASCII character received in hexadecimal format
XR22801
ERROR_STATUS (0x049) - Read Only
Bit
15:8
7
6
5
4
3
2:0
Default
Description
0x00
Reserved
These bits are reserved and should be written as ‘0’.
0
Break_Active
0: No break condition currently active
1: Break condition currently active
0
Overrun
0: No overrun error detected
1: Overrun error detected since last register read
0
Parity
0: No parity error detected
1: Parity error detected since last register read
0
Frame
0: No frame error detected
1: Frame error detected since last register read
0
Break
0: No break error detected
1: Break error detected since last register read
0
Reserved
These bits are reserved and should be written as ‘0’.
TX_BREAK (0x04A) - Read/Write
Bit
15:0
Default
Description
0x0000
Value
This register controls transmission of break signal. Writing a non-zero value "N" to this registers causes the
XR22801 to send a break signal on the UART TX pin for "N" ms, for 0 < N < 0xFFFF. A counter will decrement
this value at 1 ms intervals until the count reaches 0x0 at which time the break signal will stop being sent. Writ-
ing a value of 0xFFFF causes a continuous break signal to be sent, until either a value of 0x0 is written or
another non-zero value other than 0xFFFF which will again cause break signal to stop after the counter expires.
© 2015 Exar Corporation
21 / 42
exar.com/XR22801
Rev 1B