Rabbit 6000 User’s Manual
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189
19.2.3 Other Registers
19.2.4 Interrupts
A serial port interrupt will be generated whenever any of the following occurs.
•
A byte is available in the receive buffer.
•
A byte is moved from the transmit buffer to the transmitter.
•
The transmitter is idle.
These occurrences correspond to bits 7, 3, and 2 of the Serial Port Status Registers.
The serial port interrupt vectors are located in the IIR as follows.
•
Serial Port A at offset 0x0C0
•
Serial Port B at offset 0x0D0
•
Serial Port C at offset 0x0E0
•
Serial Port D at offset 0x0F0
Each of them can be set as Priority 1, 2, or 3 in SxCR, where x is A – D for the four serial ports.
Register
Function
TAT4R
Serial Port A baud rate generation
TAT5R
Serial Port B baud rate generation
TAT6R
Serial Port C baud rate generation
TAT7R
Serial Port D baud rate generation
PCFR, PCAHR,
PCALR
PDFR, PDAHR,
PDALR
PEFR, PEAHR,
PEALR
Alternate port output selection
TAT1R Prescaler
for
TAT4R-TAT7R
TAPR
Prescaler for TAT1R
TACR
Input selection for TAT4R-TAT7R
Содержание 6000
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