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12-51
SERIAL I/O
12.7 Receive Operation in UART Mode
32180 Group User's Manual (Rev.1.0)
Figure 12.7.2 Receive Operation during UART Mode (Hardware Processing)
The following processing is automatically performed in hardware.
Receive data
Y
Y
N
Transfer data from the SIO Receive Shift
Register to the SIO Receive Buffer Register
Set the SIO Receive Control Register
reception finished bit to "1"
Set the receive status bit to "1"
Overrun error ?
Parity error
or
framing error ?
Receive conditions
met ?
Start bit detected
normally ?
N
Set the SIO Receive Control
Register overrun error bit
and error sum bit to "1"
Set the SIO Receive Control
Register'scorresponding error bit
and receive error sum bit to "1"
N
UART receive
operation starts
End of UART reception
Y
N
Y
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