TMPM330 - Keil

9.5.4 Mode 3 (9-bit UART)
Under development
TMPM330 (rev 0.4) 9-49
TMPM330
The 9-bit UART mode can be selected by setting SC0MOD0 to “11.” In this mode,
parity bits must be disabled (SC0CR = “0”).
The most significant bit (9th bit) is written to bit 7 of the serial mode control register 0
(SC0MOD0) for transmitting data. The data is stored in bit 7 of the serial control
register SC0CR. When writing or reading data to/from the buffers, the most significant bit
must be written or read first before writing or reading to/from SC0BUF. The stop bit length
can be specified using SC0MOD2 .
Wakeup function
In the 9-bit UART mode, slave controllers can be operated in the wake-up mode by setting
the wake-up function control bit SC0MOD0 to “1.” In this case, the interrupt INTRX0
will be generated only when SC0CR is set to “1”.
TXD
RXD TXD RXD TXD RXD TXD
RXD
Master Slave 1 Slave 2 Slave 3
(Note) The TXD pin of the slave controller must be set to the open drain output mode
using the ODE register.
Fig. 9-16 Serial Links to Use Wake-up Function
Serial Channel (SIO)