CHAPTER 12 SERIAL INTERFACE UART6
Preliminary User’s Manual U16846EJ1V0UD
238
Figure 12-10. Format of Asynchronous Serial Interface Control Register 6 (ASICL6) (2/2)
SBL62
SBL61
SBL60
SBF transmission output width control
1
0
1
SBF is output with 13-bit length.
1
1
0
SBF is output with 14-bit length.
1
1
1
SBF is output with 15-bit length.
0
0
0
SBF is output with 16-bit length.
0
0
1
SBF is output with 17-bit length.
0
1
0
SBF is output with 18-bit length.
0
1
1
SBF is output with 19-bit length.
1
0
0
SBF is output with 20-bit length.
DIR6
First-bit
specification
0
MSB
1
LSB
TXDLV6
Enables/disables inverting T
X
D6 output
0
Normal output of T
X
D6
1
Inverted output of T
X
D6
Cautions 1. In the case of an SBF reception error, return the mode to the SBF reception mode and hold
the status of the SBRF6 flag.
2. Before setting the SBRT6 bit, make sure that bit 7 (POWER6) and bit 5 (RXE6) of ASIM6 = 1.
3. The read value of the SBRT6 bit is always 0. SBRT6 is automatically cleared to 0 after SBF
reception has been correctly completed.
4. Before setting the SBTT6 bit to 1, make sure that bit 7 (POWER6) and bit 6 (TXE6) of ASIM6 =
1.
5. The read value of the SBTT6 bit is always 0. SBTT6 is automatically cleared to 0 at the end of
SBF transmission.
6. Before rewriting the DIR6 and TXDLV6 bits, clear the TXE6 and RXE6 bits to 0.
7. When using the 78K0/KB1+ to evaluate the program of a mask ROM version of the 78K0/KB1,
set the SBTT6, SBL62, SBL61, and SBL60 bits to 0, 1, 0, 1, respectively.
