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SERIAL CONTROL MODULE: UART
UART Interrupt Identification register
408 Hardware Reference NS9215
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UART Interrupt Identification register
Address: 9001_1108 / 9001_9108 / 9002_1108 / 9002_9108, Read
The UART Interrupt Identification register reads the source of the interrupt from
the UART. This register is for diagnostic purposes only.
Register
Register bit
assignment
D02 R/W ELSI 0 Enables receive line status interrupt
0Disabled
1 Enabled
D01 R/W ETBEI 0 Enables transmit holding register empty interrupt
0Disabled
1 Enabled
D00 R/W ERBFI 0 Enables receive data available interrupt
0Disabled
1 Enabled
Bits Access Mnemonic Reset Description
13121110987654321015 14
31 29 28 27 26 25 24 23 22 21 20 19 18 17 1630
Reserved
Reserved
IIR
Bits Access Mnemonic Reset Description
D31:04 N/A Reserved N/A N/A
D03:00 R IIR N/A Interrupt identification
0110 Receiver line status error
0100 Receive data available
0010 Transmit holding register empty
0000 Modem status