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Chapter 15
Asynchronous Serial Interface C (UARTC)
User’s Manual U16580EE3V1UD00
15.5.3 SBF transmit operation
When the UCnPWR bit = the UCnTXE bit of the UCnCTL0 register = 1, the transmission enabled status
is entered, and SBF transmission is started by setting (to 1) the SBF transmission trigger (UCnSTT bit
of UCnOPT0 register).
Thereafter, a low-level width of bits 13 to 20 specified by the UCnSLS2 to UCnSLS0 bits of the
UCnOPT0 register is output. A transmission enable interrupt (INTUCnT) is generated upon SBF
transmission start. Following the end of SBF transmission, the UCnSTT bit is automatically cleared.
Thereafter, the UART transmission mode is restored.
Transmission is suspended until the data to be transmitted next is written to the UCnTX register, or until
the SBF transmission trigger (UCnSTT bit) is set.
Figure 15-14:
SBF Transmission Timing
INTUCnT
interrupt
1
2
3
4
5
6
7
8
9
10
11
12
13
Stop
bit
Setting of UCnSTT bit
Summary of Contents for MuPD70F3187
Page 6: ...6 Preface User s Manual U16580EE3V1UD00 ...
Page 16: ...16 User s Manual U16580EE3V1UD00 ...
Page 28: ...28 User s Manual U16580EE3V1UD00 ...
Page 32: ...32 User s Manual U16580EE3V1UD00 ...
Page 84: ...84 Chapter 2 Pin Functions User s Manual U16580EE3V1UD00 MEMO ...
Page 144: ...144 Chapter 3 CPU Functions User s Manual U16580EE3V1UD00 MEMO ...
Page 312: ...312 Chapter 9 16 Bit Timer Event Counter P User s Manual U16580EE3V1UD00 MEMO ...
Page 534: ...534 Chapter 11 16 bit Timer Event Counter T User s Manual U16580EE3V1UD00 ...
Page 969: ...969 Chapter 20 Port Functions User s Manual U16580EE3V1UD00 MEMO ...
Page 970: ...970 Chapter 20 Port Functions User s Manual U16580EE3V1UD00 ...
Page 976: ...976 Chapter 22 Internal RAM Parity Check Function User s Manual U16580EE3V1UD00 MEMO ...
Page 984: ...984 Chapter 23 On Chip Debug Function OCD User s Manual U16580EE3V1UD00 MEMO ...
Page 1006: ...1006 Chapter 24 Flash Memory User s Manual U16580EE3V1UD00 MEMO ...
Page 1036: ...1036 Chapter 27 Recommended Soldering Conditions User s Manual U16580EE3V1UD00 MEMO ...
Page 1046: ...1046 Appendix A Index User s Manual U16580EE3V1UD00 MEMO ...
Page 1052: ...1052 User s Manual U16580EE3V1UD00 ...
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