ML51/ML54/ML56
Sep. 01, 2020
Page
203
of 719
Rev 2.00
ML
51
/ML
54
/ML
5
6 S
E
RI
E
S
TECHNI
CA
L
RE
F
E
R
E
NC
E
M
A
NU
A
L
ML51/M
L54
/M
L56
Series
Tec
hnical Reference
Manual
AUXR1
– Auxiliary Register 1
Register
SFR Address
Reset Value
AUXR1
C9H, Page 1
0000_0000 b
7
6
5
4
3
2
1
0
-
-
-
-
UART3PX
UART2PX
UART1PX
UART0PX
-
-
-
-
R/W
R/W
R/W
R/W
Bit
Name
Description
[7:4]
-
Reserved
[3]
UART3PX
Serial Port 3 RX (SMC1 DATA) /TX (SMC1 CLK) Pin Exchange
0 = Assign UART3 RXD (SMC1 DATA) to multiple I/O pin RXD
UART3 TXD (SMC CLK) to multiple I/O pin TXD
1 = Assign UART3 RXD (SMC1 DATA) to multiple I/O pin TXD
UART3 TXD (SMC CLK) to multiple I/O pin RXD
Note : that Pin direction is controlled by I/O type of relative pin.
RXD/TXD will exchange immediately once setting or clearing this bit. User should take care
of not exchanging pins during transmission or receiving. Or it may cause unpredictable
situation and no warning alarms.
[2]
UART2PX
Serial Port 2 RX (SMC0 DATA) /TX (SMC0 CLK) Pin Exchange
0 = Assign UART2 RXD (SMC0 DATA) to multiple I/O pin RXD
UART2 TXD (SMC CLK) to multiple I/O pin TXD
1 = Assign UART2 RXD (SMC0 DATA) to multiple I/O pin TXD
UART2 TXD (SMC CLK) to multiple I/O pin RXD
Note : that Pin direction is controlled by I/O type of relative pin.
RXD/TXD will exchange immediately once setting or clearing this bit. User should take care
of not exchanging pins during transmission or receiving. Or it may cause unpredictable
situation and no warning alarms.
[1]
UART1PX
Serial Port 1 RX/TX Pin Exchange
0 = Assign UART1 RXD to multiple I/O pin RXD
UART1 TXD to multiple I/O pin TXD
1 = Assign UART1 RXD to multiple I/O pin TXD
UART1 TXD to multiple I/O pin RXD
Note:
that Pin direction is controlled by I/O type of relative pin.
RXD/TXD will exchange immediately once setting or clearing this bit. User should take care
of not exchanging pins during transmission or receiving. Or it may cause unpredictable
situation and no warning alarms.
