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ST20-GP1 Datasheet(PDF) 78 Page - STMicroelectronics

Part # ST20-GP1
Description  GPS PROCESSOR
PDF  116 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST20-GP1 Datasheet(HTML) 78 Page - STMicroelectronics

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An overall interrupt request signal (ASC_interrupt) is generated from the OR of the ErrorInterrupt
signal and the TxEmpty, TxBufEmpty and RxBufFull signals.
Note: the status register
cannot be written directly by software. The reset mechanism for the status
register is described below.
The transmitter interrupt status bits (TxEmpty, TxBufEmpty) are reset when a character is written
to the transmitter buffer.
The receiver interrupt status bit (RxBufFull) is reset when a character is read from the receive
buffer.
The error status bits (ParityError, FrameError, OverrunError) are reset when a character is read
from the receive buffer.
Figure 13.4 ASC status and interrupt registers
&
&
&
&
&
&
register
register
RxBufFullIE
TxEmptyIE
TxBufEmptyIE
ParityErrorIE
FrameErrorIE
OverrunErrorIE
ASCIntEnable
ASCStatus
OR
Receive buffer
full interrupt
Transmitter
empty interrupt
Transmit buffer
empty interrupt
Error interrupt
RxBufFull
TxEmpty
TxBufEmpty
ParityError
FrameError
OverrunError
RESERVED
RESERVED
read 0, write 0
read 0, write 0



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