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FUNCTIONAL DESCRIPTION
A. INTERRUPT
ENABLE REGISTER
+-------+
D7 | 0 |
+-------+
D6 | 0 |
+-------+
D5 | 0 |
+-------+
D4 | 0 |
+-------+
D3 | EDSSI |----- MODEM status
+-------+
D2 | ELSI |----- Receiver line status
+-------+
D1 | ETBEI |----- Transmitter holding register empty
+-------+
D0 | ERBFI |----- Received data available
+-------+
Figure 3. Interrupt enable register bit definitions.
EDSSI - MODEM Status Interrupt:
When set (logic 1), enables interrupt on clear to
send, data set ready, ring indicator, and data
carrier detect.
ELSI - Receiver Line Status Interrupt:
When set (logic 1), enables interrupt on overrun,
parity, and framing errors, and break indication.
ETBEI - Transmitter Holding Register Empty Interrupt:
When set (logic 1), enables interrupt on
transmitter register empty.
ERBFI - Received Data Available Interrupt:
When set (logic 1), enables interrupt on received
data available or FIFO trigger level.
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