NEC 78K0 Series User Manual page 360

(6) Asynchronous serial interface control register 6 (ASICL6)
This register controls the serial communication operations of serial interface UART6.
ASICL6 can be set by a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation sets this register to 16H.
Caution ASICL6 can be refreshed (the same value is written) by software during a communication
operation (when bit 7 (POWER6) and bit 6 (TXE6) of ASIM6 = 1 or bit 7 (POWER6) and bit 5
(RXE6) of ASIM6 = 1). However, do not set both SBRT6 and SBTT6 to 1 by a refresh operation
during SBF reception (SBRT6 = 1) or SBF transmission (until INTST6 occurs since SBTT6 has
been set (1)), because it may re-trigger SBF reception or SBF transmission.
Figure 15-10. Format of Asynchronous Serial Interface Control Register 6 (ASICL6) (1/2)
Address: FF58H After reset: 16H R/W
Symbol <7>
ASICL6 SBRF6
SBRF6
0
1
SBRT6
0
1
SBTT6
0
1
Note Bit 7 is read-only.
360
CHAPTER 15 SERIAL INTERFACE UART6
Note
<6> 5
SBRT6 SBTT6
If POWER6 = 0 and RXE6 = 0 or if SBF reception has been completed correctly
SBF reception in progress
SBF reception trigger
SBF transmission trigger
Preliminary User's Manual U17260EJ3V1UD
4 3
SBL62 SBL61 SBL60
SBF reception status flag
SBF reception trigger
−
SBF transmission trigger
−
2 1 0
DIR6 TXDLV6