XR21B1411IL-0A-EB Datasheet, PDF (20/30 Pages) Exar Corporation – ENHANCED 1-CH FULL-SPEED USB UART

XR21B1411
ENHANCED 1-CH FULL-SPEED USB UART
TABLE 9: DATA FIELD OF STANDARD INTERRUPT PACKET
REV. 1.2.0
BITS
D15..D7
D6
D5
D4
D3
D2
D1
D0
FIELD
bOverRun
bParity
bFraming
bRingSignal
bBreak
bTxCarrier
bRxCarrier
DESCRIPTION
Reserved (future use)
Received data has been discarded due to overrun in the device.
A parity error has occured.
A framing error has occured.
State of ring signal detection of the device.
State of break detection mechanism of the device.
State of transmission carrier. This signal corresponds to V.24 signal 106 and
RS-232 signal DSR.
State of receiver carrier detection mechanism of device. This signal corre-
sponds to V.24 signal 109 and RS-232 signal DCD.
If the Exar vendor specific packet mapping is enabled then the data field also includes interrupt status for all of
the UART / GPIO pins as follows:
TABLE 10: DATA FIELD OF CUSTOMIZED INTERRUPT PACKET - EXAR VENDOR SPECIFIC
BIT(S)
FIELD
DESCRIPTION
15
D15
Reserved (0)
14
D14
bGPIO5 (RTS)
13
D13
bGPIO4 (CTS)
12
D12
bGPIO3 (DTR)
11
D11
bGPIO0 (RI)
10
D10
Reserved (0)
9
D9
bGPIO2 (DSR)
8
D8
bGPIO1 (CD)
7
D7
Reserved (0)
6
D6
bOverRun
5
D5
bParity
4
D4
bFraming
3
D3
bRingSignal (RI)
2
D2
bBreak
1
D1
bTxCarrier (DSR)
0
D0
bRxCarrier (CD)
20