HD404669 Datasheet, PDF (75/142 Pages) Hitachi Semiconductor – Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit

HD404669 Series
Port mode register C (PMRC: $025): Write-only register that selects R4₀/EVND pin function as shown
in figure 56. It is reset to $0 by MCU reset.
Port mode register C (PMRC: $025) bits 3 and 1 (PMRC3, PMRC1) are reset to 00 by an MCU reset or in
stop mode. Bit 2 (PMRC2) is reset to 0 by an MCU reset, but retains its previous setting in stop mode.
Port mode register C (PMRC: $025)
Bit
3
2
1
0
Initial value
Read/Write
Bit name
0
0
0
—
W
W
W
—
PMRC3 PMRC2 PMRC1 Not Used
PMRC2
0
1
D₁₂/STOPC pin mode selection
D₁₂
STOPC
PMRC1
0
1
R4₀/EVND pin mode selection
R4₀
EVND
PMRC3
0
1
D₁₃/INT₀ pin mode selection
D₁₃
INT₀
Figure 56 Port Mode Register C (PMRC)
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