Datasheet

CHAPTER 14 SERIAL INTERFACE UART6
User’s Manual U18698EJ1V0UD
355
The relationship between the register settings and pins is shown below.
Table 14-2. Relationship Between Register Settings and Pins
(a) When the P12 and P13 are selected as the UART6 pins using the bits 4, 5 (ISC4, ISC5) of the ISC register
Pin Function POWER6 TXE6 RXE6 PM13 P13 PM12 P12 UART6
Operation
T
XD6/KR4/TxD0/P13 RXD6/KR3/RxD0/P12
0 0 0 ×
Note
×
Note
×
Note
×
Note
Stop KR4/TxD0/P13 KR3/RxD0/P12
0 1 ×
Note
×
Note
1
×
Reception KR4/P13 RXD6
1 0 0
×
×
Note
×
Note
Transmission TXD6 KR3/P12
1
1 1 0
×
1
×
Transmission/
reception
T
XD6 RXD6
Note Can be set as port function, key interrupt, or serial interface UART0 (only when UART6 is stopped).
Caution TxD6/SEG6/P112 and RxD6/SEG7/P113 pins function as the SEG6/P112 and SEG7/P113.
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
(b) When the P112 and P113 are selected as the UART6 pins using the bits 4, 5 (ISC4, ISC5) of the ISC register
Pin Function POWER6 TXE6 RXE6 PM112 P112 PM113 P113 UART6
Operation
T
XD6/SEG6/P112 RXD6/SEG7/P113
0 0 0 ×
Note
×
Note
×
Note
×
Note
Stop SEG6/P112 SEG7/P113
0 1 ×
Note
×
Note
1
×
Reception SEG6/P112 RXD6
1 0 0 1 ×
Note
×
Note
Transmission TXD6 SEG7/P113
1
1 1 0 1 1
×
Transmission/
reception
T
XD6 RXD6
Note Can be set as port function or segment output.
Caution TxD6/KR4/TxD0/P13 and RxD6/KR3/RxD0/P12 pins function as the KR4/TxD0/P13 and
KR3/RxD0/P12.
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
PM11×: Port mode register
P11×: Port output latch