Mitsubishi Electric M32R Series User Manual page 567

12
(1) CDIV (baud rate generator count source select) bits
These bits select the count source for the baud rate generator (BRG).
Note : If f(BCLK) is selected as the count source for the BRG, make sure when you set BRG that
the baud rate will not exceed the maximum transfer rate. For details, refer to the section of
this manual where the BRG register is described.
(2) TSTAT (transmit status) bit
[Set condition]
This bit is set to 1 by a write to the Transmit Buffer Register when transmit is enabled.
[Clear condition]
This bit is cleared to 0 when transmit is idle (no data in the Transmit Shift Register) and no
data exists in the Transmit Buffer Register. This bit also is cleared by clearing the transmit
enable bit.
(3) TBE (transmit buffer empty) bit
[Set condition]
This bit is set to 1 when data is transferred from the Transmit Buffer Register to the
Transmit Shift Register and the Transmit Buffer Register becomes empty. This bit also is
set by clearing the transmit enable bit.
[Clear condition]
This bit is cleared to 0 by writing data to the lower byte of the Transmit Buffer Register when
transmit is enabled (TEN = 1).
(4) TEN (transmit enable) bit
Transmit is enabled by setting this bit to 1 and disabled by clearing this bit to 0. If this bit is cleared
to 0 while transmitting data, the transmit operation stops.
(D5)
(D6)
(D7)
12-17
12.2 Serial I/O Related Registers
(D2, D3)
SERIAL I/O
Ver.0.10