NEC 78K0S/KB1+ User Manual page 197

The relationship between the register settings and pins is shown below.
Table 11-2. Relationship Between Register Settings and Pins
POWER6 TXE6 RXE6
0 0 0
1 0 1
1 0
1 1
Note Can be set as port function.
Remark ×: don't care
POWER6: Bit 7 of asynchronous serial interface operation mode register 6 (ASIM6)
TXE6: Bit 6 of ASIM6
RXE6: Bit 5 of ASIM6
PM4×: Port mode register
P4×: Port output latch
CHAPTER 11 SERIAL INTERFACE UART6
PM43 P43 PM44
Note Note Note
× × ×
Note Note
× × 1
Note
0 1 ×
0 1 1
User's Manual U17446EJ3V1UD
P44 UART6
Operation
TxD6/INTP1/P43
Note
× Stop
× Reception
Note
× Transmission
× Transmission/
reception
Pin Function
RxD6/P44
P43 P44
P43 RxD6
TxD6 P44
TxD6 RxD6
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