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参数资料
型号： DM164134
厂商： Microchip Technology
文件页数： 26/116页
文件大小： 0K
描述： KIT DEV PIC18F4XK22
标准包装： 1
系列： PIC® 18F
类型： MCU
适用于相关产品： PIC18F4XK22，PIC18F2XK22
所含物品： 板，文档
2006 Microchip Technology Inc.
DS41159E-page 23
PIC18FXX8
2.7
Effects of Sleep Mode on the
On-Chip Oscillator
When the device executes a SLEEP instruction, the
on-chip clocks and oscillator are turned off and the
device is held at the beginning of an instruction cycle
(Q1 state). With the oscillator off, the OSC1 and OSC2
signals will stop oscillating. Since all the transistor
switching currents have been removed, Sleep mode
achieves the lowest current consumption of the device
(only leakage currents). Enabling any on-chip feature
that will operate during Sleep will increase the current
consumed during Sleep. The user can wake from
Sleep through external Reset, Watchdog Timer Reset
or through an interrupt.
2.8
Power-up Delays
Power-up delays are controlled by two timers so that no
external Reset circuitry is required for most applica-
tions. The delays ensure that the device is kept in
Reset until the device power supply and clock are
stable. For additional information on Reset operation,
see Section 3.0 “Reset”.
The first timer is the Power-up Timer (PWRT), which
optionally provides a fixed delay of TPWRT (parameter
#D033) on power-up only (POR and BOR). The second
timer is the Oscillator Start-up Timer (OST), intended to
keep the chip in Reset until the crystal oscillator is
stable.
With the PLL enabled (HS4 Oscillator mode), the time-
out sequence following a Power-on Reset is different
from other oscillator modes. The time-out sequence is
as follows: the PWRT time-out is invoked after a POR
time delay has expired, then the Oscillator Start-up
Timer (OST) is invoked. However, this is still not a
sufficient amount of time to allow the PLL to lock at high
frequencies. The PWRT timer is used to provide an
additional fixed 2 ms (nominal) to allow the PLL ample
time to lock to the incoming clock frequency.
TABLE 2-3:
OSC1 AND OSC2 PIN STATES IN SLEEP MODE
OSC Mode
OSC1 Pin
OSC2 Pin
RC
Floating, external resistor should pull high
At logic low
RCIO
Floating, external resistor should pull high
Configured as PORTA, bit 6
ECIO
Floating
Configured as PORTA, bit 6
EC
Floating
At logic low
LP, XT and HS
Feedback inverter disabled at quiescent
voltage level
Feedback inverter disabled at quiescent
voltage level
Note:
See Table 3-1 in Section 3.0 “Reset” for time-outs due to Sleep and MCLR Reset.
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DM164135 制造商:Microchip Technology Inc 功能描述:KIT, ONEPIC DEMO BOARD, PLUS PICKIT 3 制造商:Microchip Technology Inc 功能描述:KIT, ONEPIC DEMO BOARD, PLUS PICKIT 3; SVHC:No SVHC (19-Dec-2012) ;RoHS Compliant: Yes 制造商:Microchip Technology Inc 功能描述:One PIC MCU Platform Board with PICkit 3
DM164135 制造商:Microchip Technology Inc 功能描述:PICKIT 3 IN-CIRCUIT DEBUGGER
DM173001 功能描述:开发板和工具包 - PIC / DSPIC PICDEM 17 PIC17CXX RoHS:否 制造商:Microchip Technology 产品:Starter Kits 工具用于评估:chipKIT 核心:Uno32 接口类型: 工作电源电压:
DM180021 功能描述:开发板和工具包 - PIC / DSPIC PIC18 Starter Kit RoHS:否 制造商:Microchip Technology 产品:Starter Kits 工具用于评估:chipKIT 核心:Uno32 接口类型: 工作电源电压:
DM1800-434MB 功能描述:射频模块 DM1800 Base Station 433.92 MHz RoHS:否 制造商:Linx Technologies 产品:Transceiver Modules 频带:902 MHz to 928 MHz 输出功率:- 15.5 dBm to + 12.5 dBm 接口类型:UART 工作电源电压:- 0.3 VDC to + 5.5 VDC 传输供电电流:38.1 mA 接收供电电流:22.7 mA 天线连接器类型:U.FL 最大工作温度:+ 85 C 尺寸:1.15 mm x 0.63 mm x 0.131 mm
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