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C8051F363 参数 Datasheet PDF下载

C8051F363图片预览
型号: C8051F363
PDF下载: 下载PDF文件 查看货源
内容描述: 混合信号ISP功能的Flash MCU系列 [Mixed Signal ISP Flash MCU Family]
分类和应用:
文件页数/大小: 288 页 / 2659 K
品牌: SILICON [ SILICON ]
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C8051F360/1/2/3/4/5/6/7/8/9  
SFR Definition 12.1. VDM0CN: V Monitor Control  
DD  
SFR Page:  
all pages  
SFR Address: 0xFF  
R/W  
R
R
R
R
R
R
R
Reset Value  
VDMEN VDDSTAT Reserved Reserved Reserved Reserved Reserved Reserved Variable  
Bit7  
Bit6  
Bit5  
Bit4  
Bit3  
Bit2  
Bit1  
Bit0  
Bit 7:  
VDMEN: V Monitor Enable.  
DD  
This bit turns the V Monitor circuit on/off. The V Monitor cannot generate system resets  
DD  
DD  
until it is also selected as a reset source in register RSTSRC (SFR Definition 12.2). The V  
DD  
Monitor must be allowed to stabilize before it is selected as a reset source. Selecting the  
Monitor as a reset source before it has stabilized may generate a system reset.  
V
DD  
0: V Monitor Disabled.  
DD  
1: V Monitor Enabled.  
DD  
Bit 6:  
V
STAT: V Status.  
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This bit indicates the current power supply status (V Monitor output).  
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0: V is at or below the V Monitor threshold.  
DD  
DD  
1: V is above the V Monitor threshold.  
DD  
DD  
Bits 5–0: RESERVED. Read = Variable. Write = don’t care.  
12.3. External Reset  
The external RST pin provides a means for external circuitry to force the device into a reset state. Assert-  
ing an active-low signal on the RST pin generates a reset; an external pullup and/or decoupling of the RST  
pin may be necessary to avoid erroneous noise-induced resets. See Table 12.1 for complete RST pin  
specifications. The PINRSF flag (RSTSRC.0) is set on exit from an external reset.  
12.4. Missing Clock Detector Reset  
The Missing Clock Detector (MCD) is a one-shot circuit that is triggered by the system clock. If the system  
clock remains high or low for more than 100 µs, the one-shot will time out and generate a reset. After a  
MCD reset, the MCDRSF flag (RSTSRC.2) will read ‘1’, signifying the MCD as the reset source; otherwise,  
this bit reads ‘0’. Writing a ‘1’ to the MCDRSF bit enables the Missing Clock Detector; writing a ‘0’ disables  
it. The state of the RST pin is unaffected by this reset.  
12.5. Comparator0 Reset  
Comparator0 can be configured as a reset source by writing a ‘1’ to the C0RSEF flag (RSTSRC.5).  
Comparator0 should be enabled and allowed to settle prior to writing to C0RSEF to prevent any turn-on  
chatter on the output from generating an unwanted reset. The Comparator0 reset is active-low: if the non-  
inverting input voltage (on CP0+) is less than the inverting input voltage (on CP0-), the device is put into  
the reset state. After a Comparator0 reset, the C0RSEF flag (RSTSRC.5) will read ‘1’ signifying  
Comparator0 as the reset source; otherwise, this bit reads ‘0’. The state of the RST pin is unaffected by  
this reset.  
Rev. 1.0  
131