NEC 78K0/KB1+ Preliminary User's Manual page 242

The relationship between the register settings and pins is shown below.
Table 12-2. 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
PM1×: Port mode register
P1×: Port output latch
242
CHAPTER 12 SERIAL INTERFACE UART6
PM13 P13 PM14
Note Note Note
× × ×
Note Note
× × 1
Note
0 1 ×
0 1 1
Preliminary User's Manual U16846EJ1V0UD
P14 UART6
Operation
TxD6/P13
Note
× Stop
× Reception
Note
× Transmission
× Transmission/
reception
Pin Function
RxD6/P14
P13 P14
P13 RxD6
TxD6 P14
TxD6 RxD6