NEC 78K0 Series User Manual page 361

Figure 15-10. Format of Asynchronous Serial Interface Control Register 6 (ASICL6) (2/2)
SBL62 SBL61
1
1
1
0
0
0
0
1
DIR6
0 MSB
1 LSB
TXDLV6
0 Normal output of T
1 Inverted output of T
Cautions 1. In the case of an SBF reception error, the mode returns to the SBF reception mode. The
status of the SBRF6 flag is held (1).
2. Before setting the SBRT6 bit, make sure that bit 7 (POWER6) and bit 5 (RXE6) of ASIM6 = 1.
After setting the SBRT6 bit to 1, do not clear it to 0 before SBF reception is completed (before
an interrupt request signal is generated).
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. After setting the SBTT6 bit to 1, do not clear it to 0 before SBF transmission is completed
(before an interrupt request signal is generated).
5. The read value of the SBTT6 bit is always 0. SBTT6 is automatically cleared to 0 at the end of
SBF transmission.
6. Do not set the SBRT6 bit to 1 during reception, and do not set the SBTT6 bit to 1 during
transmission.
7. Before rewriting the DIR6 and TXDLV6 bits, clear the TXE6 and RXE6 bits to 0.
CHAPTER 15 SERIAL INTERFACE UART6
SBL60
0 1 SBF is output with 13-bit length.
1 0 SBF is output with 14-bit length.
1 1 SBF is output with 15-bit length.
0 0 SBF is output with 16-bit length.
0 1 SBF is output with 17-bit length.
1 0 SBF is output with 18-bit length.
1 1 SBF is output with 19-bit length.
0 0 SBF is output with 20-bit length.
Enables/disables inverting T
D6
X
D6
X
Preliminary User's Manual U17260EJ3V1UD
SBF transmission output width control
First-bit specification
D6 output
X
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