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參數資料
| 型號： | CR16MHS9VJEE |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | 16位微控制器 |
| 英文描述： | Family of CompactRISC 16-Bit Microcontrollers |
| 中文描述： | 家庭CompactRISC 16位微控制器 |
| 文件頁數： | 37/99頁 |
| 文件大?。?/td> | 449K |
| 代理商： | CR16MHS9VJEE |
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11.0
Dual Clock and Reset
The Dual Clock and Reset module (CLK2RES) generates a
high-speed main system clock from an external crystal net-
work and a slow clock (32.768 kHz or other rate) for operat-
ing the device in Power Save mode. It also provides the main
system reset signal and a power-on reset function.
Figure6 is block diagram of the Dual Clock and Reset mod-
ule.
11.1
EXTERNAL CRYSTAL NETWORK
An external crystal network is required at pins X1CKI and
X1CKO for the main clock. A similar external crystal network
may be used at pins X2CKI and X2CKO for the slow clock in
packages that have these pins. If an external crystal network
is not used for the slow clock, the clock is generated by divid-
ing the fast main clock.
Figure7 shows the required crystal network at X1CKI/
X1CKO and optional crystal network at X2CKI/X2CKO.
Table13 shows the component specifications for the main
crystal network and Table14 shows the component specifi-
cations for the 32.768 kHz crystal network.
Figure 6.
Dual Clock and Reset Module Block Diagram
14-Bit Timer
6-Bit Timer
Start-Up-Delay
Start-Up-Delay
Preset
Preset
Power-On-Reset
System
Reset
Stop
Main Osc In
RESET
X1CKI
X1CKO
X2CKI
X2CKO
Main Osc.
32kHz Osc.
Stop Main Osc.
Stop 32kHz Osc.
Main Clk
Good Main
Clk
Low Speed
Clk
Good Low
Speed Clk
Stop Low
Speed Clk
Time-out
Time-out
M
8-Bit
Prescaler
Div.
by-2
Figure 7.
External Crystal Network
X1CKI / X2CKI
X1CKO / X2CKO
R1
R2
XTAL
C2
C1
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| CR16MHS9VJEI | Family of CompactRISC 16-Bit Microcontrollers |
| CR16MNS5 | Family of CompactRISC 16-Bit Microcontrollers |
| CR16MNS544VC | Family of CompactRISC 16-Bit Microcontrollers |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| CR16MHS9VJEI | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Family of CompactRISC 16-Bit Microcontrollers |
| CR16MNS5 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Family of CompactRISC 16-Bit Microcontrollers |
| CR16MNS544V8Y | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Microcontroller |
| CR16MNS544V9Y | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Microcontroller |
| CR16MNS544VC | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Family of CompactRISC 16-Bit Microcontrollers |
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