E202075_HD404889 Datasheet, PDF (103/202 Pages) Renesas Technology Corp – Low-Voltage AS Microcomputers with On-Chip LCD Circuit

HD404889/HD404899/HD404878/HD404868 Series
• Port mode register 3 (PMR3: $00B):
Port mode register 3 (PMR3) is a write-only register used to set the function of the R2₀/TOC pin as
shown in figure 54.
Port mode register 3 (PMR3) is reset to $0 by an MCU reset.
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
PMR33
0
1
PMR30
0
1
R20/TOC pin mode selection
R20
TOC
PMR31
0
1
R21/SCK pin mode selection
R21
SCK
PMR32 R22/SI/SO pin mode selection
∗
R22
0
SI
1
SO
∗ : Don't care
Figure 54 Port Mode Register 3 (PMR3)
• Module standby register 1 (MSR1: $00D):
Module standby register 1 (MSR1) is a write-only register used to designate supply or stopping of the
clock to timer C as shown in figure 46.
Module standby register 1 (MSR1) is reset to $0 by an MCU reset.
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