HD404459 Datasheet, PDF (81/122 Pages) Renesas Technology Corp – 4-bit HMCS400-series microcomputers

HD404459 Series
• Detection edge select register 2 (ESR2: $027): Write-only register that selects the detection edge of
signals input to pin EVND (figure 66). It is reset to $0 by MCU reset.
Detection edge register 2 (ESR2: $027)
Bit
Initial value
Read/Write
Bit name
3
0
W
ESR23
2
1
0
0
—
—
W
—
—
ESR22 Not used Not used
ESR23 ESR22
0
0
1
1
0
1
EVND detection edge
No detection
Falling-edge detection
Rising-edge detection
Double-edge detection*
Note: * Both falling and rising edges are detected.
Figure 66 Detection Edge Select Register 2 (ESR2)
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