參數(shù)資料
型號: HD4074329
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系列微電腦(4位單片微計算機)
文件頁數(shù): 37/94頁
文件大?。?/td> 573K
代理商: HD4074329
HD404328 Series
37
Internal Oscillator Circuit
A block diagram of the internal oscillator circuit is shown in figure 22. As shown in table 21, crystal and
ceramic oscillators can be connected to OSC
1
and OSC
2
, and a 32.768-kHz oscillator can be connected to
X1 and X2. The system oscillator can also be operated by an external clock. Bit 3 of the miscellaneous
register (MIS: $00C) must be set according to the frequency of the oscillator connected to OSC
1
and OSC
2
.
Note:
If the MIS register setting does not match the oscillator frequency, subsystems using 32-kHz
oscillation will malfunction. Set the system oscillator frequency to anything outside the range of
1.0 MHz to 1.6 MHz when using 32-kHz oscillation.
3
2
1
0
t
selection
RC
R1 /SO PMOS off
Setting for switching
the system oscillator’s
frequency
Miscellaneous register (MIS): $00C
System Oscillator’s
Frequency
MIS
Bit 3
0
1
1.6 MHz to 4.5 MHz
0.4 MHz to 1.0 MHz
Initial value: 0000,
R/W: W
Figure 21 Miscellaneous Register
System
oscillator
Sub-system
oscillator
Divide-by-8
circuit
Divide-by-8
circuit
Timing
generator
circuit
Timing
generator
circuit
Synch.
(t )
Synch.
(t )
Mode
control
circuit
System
clock
( )
System
clock
( )
Time-base
clock
( )
OSC
2
OSC
1
X1
X2
Figure 22 Internal Oscillator Circuit
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HD4074329C 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
HD4074329FS 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
HD4074329S 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
HD4074329U 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:microcomputer designed to increase program productivity
HD4074329UFS 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller