參數(shù)資料
型號: HD4074449
廠商: Hitachi,Ltd.
英文描述: 4-bit HMCS400-Series microcomputer(4位單片微計算機)
中文描述: 4位HMCS400系列微機(4位單片微計算機)
文件頁數(shù): 23/123頁
文件大?。?/td> 726K
代理商: HD4074449
HD404449 Series
23
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, IM1, IM2, 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 (IM0–1M3: $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
0
No
1
Yes
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參數(shù)描述
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