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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
Содержание MuPD70F3187
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Страница 976: ...976 Chapter 22 Internal RAM Parity Check Function User s Manual U16580EE3V1UD00 MEMO ...
Страница 984: ...984 Chapter 23 On Chip Debug Function OCD User s Manual U16580EE3V1UD00 MEMO ...
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Страница 1036: ...1036 Chapter 27 Recommended Soldering Conditions User s Manual U16580EE3V1UD00 MEMO ...
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