NEC 78K0S/KB1+ User Manual page 193

Figure 11-10. Format of Asynchronous Serial Interface Control Register 6 (ASICL6) (2/2)
<R>
Cautions 1. In the case of an SBF reception error, return to SBF reception mode again. The status of the
CHAPTER 11 SERIAL INTERFACE UART6
SBL62 SBL61
1 0
1 1
1 1
0 0
0 0
0 1
0 1
1 0
DIR6
0 MSB
1 LSB
TXDLV6
0 Normal output of T
1 Inverted output of T
SBRF6 flag will be held (1). For details on SBF reception refer to (2) – (i) SBF reception in
11.4.2 Asynchronous serial interface (UART) mode described later.
2. Before setting the SBRT6 bit to 1, make sure that bit 7 (POWER6) and bit 5 (RXE6) of ASIM6 =
1. Moreover, after setting the SBRT6 bit to 1, do not clear the SBRT6 bit to 0 before the SBF
reception ends (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. Moreover, after setting the SBTT6 bit to 1, do not clear the SBTT6 bit to 0 before the SBF
transmission ends (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. Before rewriting the DIR6 and TXDLV6 bits, clear the TXE6 and RXE6 bits to 0.
SBL60 SBF transmission output width control
1 SBF is output with 13-bit length.
0 SBF is output with 14-bit length.
1 SBF is output with 15-bit length.
0 SBF is output with 16-bit length.
1 SBF is output with 17-bit length.
0 SBF is output with 18-bit length.
1 SBF is output with 19-bit length.
0 SBF is output with 20-bit length.
Specification of first bit
Enabling/disabling inverting T
D6
X
D6
X
User's Manual U17446EJ3V1UD
D6 output
X
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