- 您现在的位置：买卖IC网 > PDF目录16967 > MA160014 (Microchip Technology)MOD PLUG-IN 44PIN PIC18LF45K22 PDF资料下载
参数资料
| 型号： | MA160014 |
| 厂商： | Microchip Technology |
| 文件页数： | 58/71页 |
| 文件大小： | 0K |
| 描述： | MOD PLUG-IN 44PIN PIC18LF45K22 |
| 标准包装： | 1 |
| 系列： | PIC® XLP™ 18F |
| 附件类型： | 插拔式模块（PIM）- PIC18LF45K22 |
| 适用于相关产品： | PICDEM PIC18 Explorer，DM183032 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页当前第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页
2010-2012 Microchip Technology Inc.
DS41412F-page 61
PIC18(L)F2X/4XK22
4.3
Master Clear (MCLR)
The MCLR pin provides a method for triggering an
external Reset of the device. A Reset is generated by
holding the pin low. These devices have a noise filter in
the MCLR Reset path which detects and ignores small
pulses. An internal weak pull-up is enabled when the
pin is configured as the MCLR input.
The MCLR pin is not driven low by any internal Resets,
including the WDT.
In PIC18(L)F2X/4XK22 devices, the MCLR input can
be disabled with the MCLRE Configuration bit. When
MCLR is disabled, the pin becomes a digital input. See
for
more
information.
4.4
Power-on Reset (POR)
A Power-on
Reset
pulse
is
generated on-chip
whenever VDD rises above a certain threshold. This
allows the device to start in the initialized state when
VDD is adequate for operation.
To take advantage of the POR circuitry either leave the
pin floating, or tie the MCLR pin through a resistor to
VDD. This will eliminate external RC components
usually needed to create a Power-on Reset delay. A
minimum rise rate for VDD is specified. For a slow rise
time, see Figure 4-2.
When the device starts normal operation (i.e., exits the
Reset condition), device operating parameters (volt-
age, frequency, temperature, etc.) must be met to
ensure proper operation. If these conditions are not
met, the device must be held in Reset until the operat-
ing conditions are met.
POR events are captured by the POR bit of the RCON
register. The state of the bit is set to ‘0’ whenever a
POR occurs; it does not change for any other Reset
event. POR is not reset to ‘1’ by any hardware event.
To capture multiple events, the user must manually set
the bit to ‘1’ by software following any POR.
FIGURE 4-2:
EXTERNAL POWER-ON
RESET CIRCUIT (FOR
SLOW VDD POWER-UP)
Note 1:
External Power-on Reset circuit is required
only if the VDD power-up slope is too slow.
The diode D helps discharge the capacitor
quickly when VDD powers down.
2:
15 k
< R < 40 k is recommended to make
sure that the voltage drop across R does not
violate the device’s electrical specification.
3:
R1
1 k will limit any current flowing into
MCLR from external capacitor C, in the event
of
MCLR/VPP
pin
breakdown,
due
to
Electrostatic Discharge (ESD) or Electrical
Overstress (EOS).
C
R1
R
D
VDD
MCLR
VDD
PIC MCU
相关PDF资料 |
PDF描述 |
|---|---|
| 1-1589476-5 | CONN RCPT 15POS 30AWG 30IN |
| MAX1607ESA+T | IC SW USB CURRENT LIMIT 8SOIC |
| MA180023 | MODULE PLUG-IN PIC18F46J11 PIM |
| 1-1589476-8 | CONN RCPT 15POS 32AWG 24IN |
| 0210490389 | CABLE JUMPER 1.25MM .051M 32POS |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MA160015 | 功能描述:子卡和OEM板 PIC16LF1947 PIM RoHS:否 制造商:BeagleBoard by CircuitCo 产品:BeagleBone LCD4 Boards 用于:BeagleBone - BB-Bone - Open Source Development Kit |
| MA160016 | 功能描述:子卡和OEM板 PIC16F1947 PIM RoHS:否 制造商:BeagleBoard by CircuitCo 产品:BeagleBone LCD4 Boards 用于:BeagleBone - BB-Bone - Open Source Development Kit |
| MA161 | 制造商:Panasonic Industrial Company 功能描述:DIODE |
| MA16101BAN | 制造商:MURATA 制造商全称:Murata Manufacturing Co., Ltd. 功能描述:HIGH FREQUENCY CERAMIC CAPACITORS |
| MA16101BBN | 制造商:MURATA 制造商全称:Murata Manufacturing Co., Ltd. 功能描述:HIGH FREQUENCY CERAMIC CAPACITORS |
发布紧急采购，3分钟左右您将得到回复。