Asynchronous operation, Overview, Figure 110. interrupt structure – Zilog Z08470 User Manual
Page 250: Asynchronous operation overview
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Serial Input/Output
230
Figure 110. Interrupt Structure
ASYNCHRONOUS OPERATION
Overview
To receive or transmit data in the Asynchronous mode, the Z80 SIO must
be initialized with the following parameters: character length, clock rate,
number of stop bits, even or odd parity, interrupt mode, and receiver or
transmitter enable. The parameters are loaded to the appropriate write
Buffer Becoming Empty
Transmit Interrupt
External Status
Interrupt
Break/Abort Detection
Tx Underrun/EOM
SYNC Transition
CTS Transition
DCD Transition
Z80-SIO
Interrupt
Interrupt on
First Character
Valid Address Byte (SDLC)
First Non-Sync Character (SYNC)
First Data Character
End-of-Frame (SDLC)
Framing Error
Receive Overrun Error
Parity Error
Special Receive
Condition Interrupt
Receive Character
Interrupt on All
Receive Characters
Receive
Interrupt