
HD404889/HD404899/HD404878/HD404868 Series
124
Port mode register 3 (PMR3: $00B):
Port mode register 3 (PMR3) has the following functions. See figure 71.
R2
1
/
SCK
pin selection
R2
2
/SI/SO pin selection
Port mode register 3 (PMR3) is a 4-bit write-only register used to select serial interface pin settings as
shown in figure 71. It is reset to $0 by an MCU reset.
R2
0
/TOC pin mode selection
PMR30
R2
1
/
SCK
pin mode selection
PMR31
0
1
R2
0
TOC
0
1
R2
1
SCK
PMR33 PMR32
0
1
*
0
1
R2
2
/SI/SO pin mode selection
R2
2
SI
SO
*
: Don't care
Port mode register 3 (PMR3: $00B)
Bit
Read/Write
Initial value on reset
Bit name
3
W
0
PMR33
2
W
0
PMR32
1
W
0
PMR31
0
W
0
PMR30
Figure 71 Port Mode Register 3 (PMR3)