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HD404848FS Datasheet(PDF) 26 Page - Renesas Technology Corp

Part # HD404848FS
Description  4-Bit Single-Chip Microcomputer
PDF  127 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD404848FS Datasheet(HTML) 26 Page - Renesas Technology Corp

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HD404849 Series
24
Bit
Initial value
Read/Write
Bit name
3
0
W
ESR23
2
0
W
ESR22
0
—
—
Not used
1
—
—
Not used
Detection edge selection register 2 (ESR2: $027)
ESR23
0
1
ESR22
0
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 13 Detection Edge Selection Register 2 (ESR2)
External Interrupt Masks (IM0–IM3: $000, $001, $022): Prevent (mask) interrupt requests caused by
the corresponding external interrupt request flags, as listed in table 6.
Table 6 External Interrupt Masks (IM0–IM3: $000, $001, $022)
IM0–IM3
Interrupt Request
0
Enabled
1
Disabled (masked)
Timer A Interrupt Request Flag (IFTA: $001, Bit 2): Set by overflow output from timer A, as listed in
table 7.
Table 7 Timer A Interrupt Request Flag (IFTA: $001, Bit 2)
IFTA
Interrupt Request
0No
1
Yes
Timer A Interrupt Mask (IMTA: $001, Bit 3): Prevents (masks) an interrupt request caused by the
timer A interrupt request flag, as listed in table 8.



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