收藏本站
MRF49XA
3.1.2
POWER GLITCH RESET
The Sensitive Reset mode is the default mode which
Spikes or glitches are found on the V DD line if the power
supply filtering is not satisfactory, or the internal
resistance of the power supply is very high. So, in this
case, the Sensitive Reset mode needs to be enabled.
Here, the device Reset occurs due to the transients
present on the V DD line.
can be changed using the DRSTM bit
(FIFORSTREG<0>). Figure 3-2 shows the Sensitive
Reset mode.
Normal Reset mode: The device enters this mode,
when the power glitch detection circuit is disabled.
Figure 3-3 shows the Normal Reset mode.
The internal Reset block has two basic modes of
operation:
? Sensitive Reset mode
? Normal Reset mode
Note:
Negative change in the supply voltage does
not cause a Reset event unless the V DD
level reaches the Reset threshold voltage
(i.e., 250 mV in Normal Reset mode, 1.6V in
Sensitive Reset mode).
Sensitive Reset mode: Enabling the Sensitive Reset,
a Reset is generated if:
? the positive going edge of the V DD has a rising
rate greater than 100 mV/ms, and
? the voltage difference between the internal ramp
signal and the V DD reaches the Reset threshold
If the Sensitive mode is disabled and the power supply
is turned off, the V DD requires 250 mV to trigger a
Power-on Reset when the supply voltage is reapplied.
If the decoupling capacitors retain their charges for a
longer duration, there might be no Reset after
power-up as the power glitch detector is disabled.
voltage (600 mV).
FIGURE 3-2:
V DD
SENSITIVE RESET ENABLED
Reset Threshold
Voltage (600 m V)
Note:
The Reset event reinitializes the internal
registers, and thus, the Sensitive mode is
enabled again.
Reset Ram p Line
(100 m V/m s)
1.6V
Tim e
RESET
Output
(Pin 10)
H
L
DS70590C-page 44
Preliminary
? 2009-2011 Microchip Technology Inc.
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
MRF89XA-I/MQ TXRX ISM SUB-GHZ ULP 32QFN
MRF89XAM9A-I/RM IC TXRX MOD 915MHZ ULP SUB-GHZ
MRX-001-433DR-B MODULE RECEIVER 433MHZ 18DIP
MRX-002-433DR-B MODULE RECEIVER 433MHZ 18DIP
MRX-002SL-433DR-B MODULE RCVR 433MHZ SAW LN 24DIP
MRX-005-915DR-B MODULE RECEIVER 915MHZ 18DIP
MRX-005SL-915DR-B MODULE RCVR 915MHZ SAW LN 24DIP
MRX-007-433DR-B MODULE RECEIVER 433MHZ 18DIP
相关代理商/技术参数
MRF49XAT-I/T 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:ISM Band Sub-GHz RF Transceiver
MRF49XAT-I-ST 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:ISM Band Sub-GHz RF Transceiver
MRF49XAT-I-T 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:ISM Band Sub-GHz RF Transceiver
MRF4A(AMMO) 制造商:Bel Fuse 功能描述:FUSE
MRF5 制造商:Ferraz Shawmut 功能描述:
MRF50 制造商:Ferraz Shawmut 功能描述:
MRF500 制造商:Ferraz Shawmut 功能描述:
MRF5003 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:N-CHANNEL BROADBAND RF POWER FET