David Bell Digital Signal Processing Solutions Abstract This

The Datasheet Archive - 100 Million Datasheets from 7500 Manufacturers.

David Bell Digital Signal Processing Solutions Abstract This

Datasheet Thumbnail

Top Searches for this datasheet

Reset Circuit TMS320C6000
David Bell Digital Signal Processing Solutions
Abstract
This document describes solutions used provide reset circuit Texas Instruments (TITM) TMS320C6000 digital signal processor (DSP). solution sets supply voltage supervisor, such TLC7733 TLC7725, each supply voltages, DVdd CVdd. Another solution monitors both 2.5-V/1.8-V 3.3-V power supplies using single supervisor such TPS3707. This allows released from reset only both power supplies proper levels. ensure that TMS320C6000 does generate signals unless supply voltages appropriate levels, necessary place supervisor power supplies. Whenever device powered should held reset until both 3.3-V supply (DVdd) 2.5-V core supply (CVdd) reach nominal values. Likewise, device should held reset anytime either supply falls below certain threshold value (88%).
Contents
Design Problem Solution
Digital Signal Processing Solutions
June 1999
Design Problem
provide reset circuit TMS320C6000?
Solution
ensure that TMS320C6000 does generate signals unless supply voltages appropriate levels, necessary place supervisor power supplies. Whenever device powered should held reset until both 3.3-V supply (DVdd) 2.5-V core supply (CVdd) reach nominal values. Likewise, device should held reset anytime either supply falls below certain threshold value (88%). simple accomplish both these tasks supervisor each supply voltages, DVdd CVdd. example, Texas Instruments TLC7733 TLC7725 voltage supervisors each assert /RESET signal (active low) during power-up when their supply voltage reaches This signal continues asserted until DVdd reaches threshold voltage (plus additional delay period), which time device released from reset. /RESET signal reasserted anytime voltage level falls below (2.93 TLC7733 2.25 `7725). addition holding reset while fully powered-up, TLC77xx also allows externally generated signal generate /RESET assertion. This signal could result from another device driving reset signal manual pushbutton switch being depressed. both digital signal manual reset used design, signals should combined logically (AND gate), then connected /RESIN first supervisor. external reset signals should through supervisor circuit. external reset introduced after supervisor circuit, timing delay requirements met. Figure shows sample circuit `C6000 using supervisor chip, which monitors both supply voltages allows both manual (pushbutton) externally generated reset. second-stage supervisor should delay time ensure that constant regardless cause reset.
delay period determined capacitor reset circuit. design example provided, delay times (see TLC7733 TLC7725 data sheet propagation times with first stage second stage. inputs /RESIN must meet minimum pulse requirement with rise fall times less than
Reset Circuit TMS320C6000
Figure Reset Circuit Using TLC77xx
DVdd
CVdd 100K EXT_RESET AND2 EP11SD1SAKE CONTROL RESIN SENSE RESET RESET CONTROL RESIN SENSE RESET RESET
'C6201_RESET
TLC7725
TLC7733
delay time reset circuit should determined considering switch-on time several components, which summarized Table
Table Setting Delay Timing
Switch-On Time (ms) Line operated power supply Battery power supply Oscillator (start-up time) Reset program Range delay times 10-100 0.03-30 10-100 Several microseconds 20-500
additional information about designing with TLC77xx supervisors, application report, TLC77xx Series BICMOS Supply Voltage Supervisors. Another solution available using TPS3707 monitor both 2.5-V/1.8-V 3.3-V power supplies. This allows released from reset only both power supplies proper levels. This easily done with device that also available 8-pin package does require external capacitor reset pulse width. requires resistors 1.8/2.5 voltage selection. Figure shows reference diagram showing reset circuit using TPS3707-33.
provide reset circuit that could used revision later, would necessary TLC7701 (threshold voltage place TLC7725 with voltage divider SENSE input. Please TLC77xx data sheet selecting voltage divider resistors.
Reset Circuit TMS320C6000
Figure Reset Circuit Using TPS3707-33
DVdd CVdd
100k
100k
EXT_RESET
RESET RESET TPS3707-33
'C6201_RESET
EP11SD1SAKE 110k (280k)
References
Kohl, Ingrid. TLC77xx Series BiCMOS Supply Voltage Supervisors, Literature number SLVAE03, April 1995, Texas Instruments. Haseloff, Eilhard. Supply Voltage Supervisor TLC77xx Series, Literature number SLVAE04, March 1997, Texas Instruments.
TLC7701, TLC7725, TLC7703, TLC7733, TLC7705 Micropower Supply Voltage Supervisors Data Sheet, Literature number SLVS087, March 1999, Texas Instruments. TPS3705-30, TPS3705-33, TPS3705-50, TPS3707-25, TPS3707-30, TPS3707-33, TPS3707-50 Processor Supervisory Circuits With Power-Fail Data Sheet, Literature number SLVS184B, January 1999, Texas Instruments.
Kornmeier, Bernd. TPS370x Family Application Report, Literature number SLVA045, November 1998, Texas Instruments.
circuit shown CVdd CVdd resistor value parentheses
Reset Circuit TMS320C6000
Contact Numbers
INTERNET Semiconductor Home Page www.ti.com/sc Distributors www.ti.com/sc/docs/distmenu.htm PRODUCT INFORMATION CENTERS Americas Phone +1(972) 644-5580 +1(972) 480-7800 Email sc-infomaster@ti.com Europe, Middle East, Africa Phone Deutsch +49-(0) 8161 3311 English +44-(0) 1604 3399 +34-(0) Francais +33-(0) 1-30 Italiano +33-(0) 1-30 +44-(0) 1604 Email epic@ti.com Japan Phone International +81-3-3344-5311 Domestic 0120-81-0026 International +81-3-3344-5317 Domestic 0120-81-0036 Email pic-japan@ti.com
Asia Phone International +886-2-23786800 Domestic Australia 1-800-881-011 Number -800-800-1450 China 10810 Number -800-800-1450 Hong Kong 800-96-1111 Number -800-800-1450 India 000-117 Number -800-800-1450 Indonesia 001-801-10 Number -800-800-1450 Korea 080-551-2804 Malaysia 1-800-800-011 Number -800-800-1450 Zealand 000-911 Number -800-800-1450 Philippines 105-11 Number -800-800-1450 Singapore 800-0111-111 Number -800-800-1450 Taiwan 080-006800 Thailand 0019-991-1111 Number -800-800-1450 886-2-2378-6808 Email tiasia@ti.com
trademark Texas Instruments Incorporated. Other brands names property their respective owners.
Reset Circuit TMS320C6000
IMPORTANT NOTICE Texas Instruments subsidiaries (TI) reserve right make changes their products discontinue product service without notice, advise customers obtain latest version relevant information verify, before placing orders, that information being relied current complete. products sold subject terms conditions sale supplied time order acknowledgement, including those pertaining warranty, patent infringement, limitation liability. warrants performance semiconductor products specifications applicable time sale accordance with TI's standard warranty. Testing other quality control techniques utilized extent deems necessary support this warranty. Specific testing parameters each device necessarily performed, except those mandated government requirements. CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS INVOLVE POTENTIAL RISKS DEATH, PERSONAL INJURY, SEVERE PROPERTY ENVIRONMENTAL DAMAGE ("CRITICAL APPLICATIONS"). SEMICONDUCTOR PRODUCTS DESIGNED, AUTHORIZED, WARRANTED SUITABLE LIFE-SUPPORT DEVICES SYSTEMS OTHER CRITICAL APPLICATIONS. INCLUSION PRODUCTS SUCH APPLICATIONS UNDERSTOOD FULLY CUSTOMER'S RISK. order minimize risks associated with customer's applications, adequate design operating safeguards must provided customer minimize inherent procedural hazards. assumes liability applications assistance customer product design. does warrant represent that license, either express implied, granted under patent right, copyright, mask work right, other intellectual property right covering relating combination, machine, process which such semiconductor products services might used. TI's publication information regarding third party's products services does constitute TI's approval, warranty, endorsement thereof. Copyright 1999 Texas Instruments Incorporated
Reset Circuit TMS320C6000

David Bell Digital Signal Processing Solutions Abstract This

Top Searches for this datasheet

Other recent searches