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Chapter 15
Asynchronous Serial Interface C (UARTC)
User’s Manual U16580EE3V1UD00
(7)
UARTCn status register 1 (UCnSTR1)
The UCnSTR1 register is an 8-bit register that displays the UARTCn reception status.
The register is read only, and be read in 8-bit or 1-bit units.
Reset input clears this register to 00H.
Figure 15-8:
UARTCn Status Register 1 (UCnSTR1)
After reset:
00H
R
Address:
UC0STR1 FFFFFA0BH,
UC1STR1 FFFFFA2BH
7
6
5
4
3
2
1
0
UCnSTR1
0
0
0
0
0
0
0
UCnRSF
(n = 0, 1)
UCnRSF
Receive Status Flag
0
•
When UCnPWR bit of UCnCTL0 register = 0 or UCnRXE bit of UCnCTL0
register = 0 has been set.
•
When the stop bit has been detected.
1
During reception, when the start bit has been detected.
The UCnRSF flag is set (1) by the start bit detection, and it is cleared (0) by detection of
the first stop bit condition. In case of a two stop bit setting (UCnSL bit of UCnCTL0 register
= 1), the UCnRSF flag is cleared during the first stop bit timing, simultaneously with the
reception complete interrupt timing (INTUCnR)
Содержание V850E/PH2
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