參數(shù)資料
型號(hào)： HD404612
廠商： Hitachi,Ltd.
英文描述： 4-Bit Single-Chip Microcomputer
中文描述： 4位單片機(jī)
文件頁(yè)數(shù)： 30/89頁(yè)
文件大?。?/td> 358K
代理商： HD404612
HD404618 Series
30
LSON and DTON. The DTON flag can only be set in subactive mode; it is automatically reset after a
transition to active mode.
Subactive mode is an optional function that the user must specify on the function option list.
Interrupt Frame:
In watch and subactive modes,
CLK
is supplied for timer A and the
I NT
0
circuit.
Prescaler W and timer A operate as time bases to generate interrupt frame timing. Three interrupt frame
cycles (T) can be selected by the settings of the miscellaneous register, as shown in figure 14.
In watch and subactive modes, timer A and
INT
0
interrupts are generated in synchronism with the interrupt
frame. An interrupt request is generated at the interrupt strobe timing, except when the MCU enters active
mode from watch mode. The
INT
0
falling edge is acknowledged regardless of the interrupt frame, but the
interrupt is executed simultaneously with the next interrupt strobe. Timer A generates an overflow and
interrupt request at the timing of an interrupt strobe.
t
RC
MIS: $00C
MIS1
MIS0
MIS2
Refer to
table 20
t selection
MIS
Bit 1
Bit 0
T
0
0
15.625 ms
62.5 ms
0
1
1
0
1
0.24414 ms
31.25 ms
0.24414 ms
7.8125 ms
0.12207 ms
*
2
*
1
Not used
400/800-kHz
ceramic oscillator
—
External clock input
Oscillation circuit
condition
*
1
Notes: 1.
2.
The value of t applies only when using a 32.768-kHz oscillator.
Only direct transfer.
1
Figure 14 Miscellaneous Register
Direct Transfer:
By controlling the DTON, the MCU would be placed directly from subactive to active
mode. The detailed procedure is as follows:
Set the DTON flag in subactive mode while LSON = 0.
Execute the STOP or SBY instruction.
After the oscillation stabilization time (a fixed value), the MCU will move automatically from subactive
to active mode.
Note that DTON ($020, bit 3) is valid only in subactive mode. When the MCU is in active mode, this flag
is always at reset.
The transition time (t
D
) from subactive to active mode is t
RC
< t
D
< T + t
RC
.
相關(guān)PDF資料
PDF描述
HD404612FS 4-Bit Single-Chip Microcomputer
HD404612H 4-Bit Single-Chip Microcomputer
HD404612TF 4-Bit Single-Chip Microcomputer
HD404614 4-Bit Single-Chip Microcomputer
HD404614FS 4-Bit Single-Chip Microcomputer
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HD404612FS 制造商:HITACHI 制造商全稱(chēng):Hitachi Semiconductor 功能描述:4-Bit Single-Chip Microcomputer
HD404612H 制造商:HITACHI 制造商全稱(chēng):Hitachi Semiconductor 功能描述:4-Bit Single-Chip Microcomputer
HD404612TF 制造商:HITACHI 制造商全稱(chēng):Hitachi Semiconductor 功能描述:4-Bit Single-Chip Microcomputer
HD404614 制造商:HITACHI 制造商全稱(chēng):Hitachi Semiconductor 功能描述:4-Bit Single-Chip Microcomputer
HD404614FS 制造商:HITACHI 制造商全稱(chēng):Hitachi Semiconductor 功能描述:4-Bit Single-Chip Microcomputer
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