收藏本站
dsPIC30F
FIGURE 7-1:
OSCILLATOR SYSTEM BLOCK DIAGRAM
OSC1
OSC2
Primary
Oscillator
PLL
x4, x8, x16
PLL
Primary Osc
Internal Fast
RC (FRC)
Oscillator
Clock
SOSCO
Secondary
Secondary Osc
Switching
and
Control
Block
F OSC
Programmable 4 x F CY
Clock
Divider
Oscillator
SOSCI
32 kHz
Internal Low
Power RC
(LPRC) Osc
To Timer1
7.4
Programmable Power-up Timer
7.5
Oscillator Start-up Timer/Stabilizer
(PWRT)
There are two internal timers that offer necessary
delays on power-up. One is the Power-up Timer
(PWRT), which provides a delay on power-up only. The
PWRT keeps the part in Reset while the power supply
stabilizes. The other is the Oscillator Start-up Timer
(OST), intended to keep the chip in Reset until the
crystal oscillator is stable. With these two timers on-
chip, most applications need no external Reset
circuitry.
DS70043F-page 20
(OST)
An Oscillator Start-up Timer (OST) is included to
ensure that a crystal oscillator (or ceramic resonator)
has started and stabilized. The OST is a simple 10-bit
counter that counts 1024 TOSC cycles before
releasing the oscillator clock to the rest of the system.
The time-out period is designated as TOST. The TOST
time is involved every time the oscillator has to restart
(i.e., on Power-On Reset (POR), Brown-Out Reset
(BOR) and wake-up from Sleep). The oscillator start-up
timer is applied to the LP oscillator, XT, XTL and HS
modes (upon wake-up from Sleep, POR and BOR) for
the primary oscillator.
? 2005 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
MA320002 MODULE PLUG-IN PIC32 USB OTG
MA320011 MODULE PLUG-IN PIC32MX220F32D
MA330024 MODULE PLUG-IN DSPIC33F 100TQFP
MA330027 MODULE PLUG-IN DSPIC33F 100TQFP
MA330029 MODULE PLUG-IN DSPIC33FJ16GP102
MA9D00-42 DSUB CONN W/DIAGNOSTIC PORT STRT
MAI ADAPTER PUSH-ON/M-SWTCH ATTCHMNT
MAV0020RP VARISTOR ARRY 2ELEMENT 120V 0405
相关代理商/技术参数
MA300013 制造商:Microchip Technology Inc 功能描述:Tools Development kit Kit Con
MA300014 功能描述:子卡和OEM板 dsPIC30F 80L Plug In Sample (6014A) RoHS:否 制造商:BeagleBoard by CircuitCo 产品:BeagleBone LCD4 Boards 用于:BeagleBone - BB-Bone - Open Source Development Kit
MA300015 功能描述:子卡和OEM板 dsPIC30F 80L Plug In Sample (6010A). RoHS:否 制造商:BeagleBoard by CircuitCo 产品:BeagleBone LCD4 Boards 用于:BeagleBone - BB-Bone - Open Source Development Kit
MA300016 功能描述:子卡和OEM板 dsPICDEM 80-PIN PIM RoHS:否 制造商:BeagleBoard by CircuitCo 产品:BeagleBone LCD4 Boards 用于:BeagleBone - BB-Bone - Open Source Development Kit
MA300118 功能描述:子卡和OEM板 _ RoHS:否 制造商:BeagleBoard by CircuitCo 产品:BeagleBone LCD4 Boards 用于:BeagleBone - BB-Bone - Open Source Development Kit
MA300128 功能描述:子卡和OEM板 _ RoHS:否 制造商:BeagleBoard by CircuitCo 产品:BeagleBone LCD4 Boards 用于:BeagleBone - BB-Bone - Open Source Development Kit
MA300140 功能描述:子卡和OEM板 _ RoHS:否 制造商:BeagleBoard by CircuitCo 产品:BeagleBone LCD4 Boards 用于:BeagleBone - BB-Bone - Open Source Development Kit
MA300228 功能描述:子卡和OEM板 _ RoHS:否 制造商:BeagleBoard by CircuitCo 产品:BeagleBone LCD4 Boards 用于:BeagleBone - BB-Bone - Open Source Development Kit