usb 2.0 production testing
DESCRIPTION
USB 2.0 Production Testing. Michael Pasumansky CATC. USB Production Testing. What Is in the Presentation. Production test Vs Validation Test Test Environment Test Methods Test Setup Test Coverage Test Configuration Test results. USB Production Testing. - PowerPoint PPT PresentationTRANSCRIPT
May 9, 2001 2
USB 2.0 Production Testing
Michael PasumanskyCATC
May 9, 2001 3
USB Production Testing
Production test Vs Validation Test Test Environment Test Methods Test Setup Test Coverage Test Configuration Test results
What Is in the Presentation
May 9, 2001 4
USB Production Testing
Verification test validates the correctnessof the design
Production test tests specific units of the product with the basic assumption that the product was designed to spec
Production Test vs.Verification Test
May 9, 2001 5
USB Production Testing
DOS Vs Windows Stand alone HW box Vs integrated ATE Tester recovery after testing a bad unit How to protect the tester USB connectors Operator skills
Test Environment
May 9, 2001 6
USB Production Testing
Method I - Plug a USB mouse to each one of the USB ports and check the mouse cursor movement
Method II - Use a special purpose USB tester that was designed to test USB host controllers(OHCI / UHCI) and USB hubs
Test Methods
May 9, 2001 7
USB HCUSB HCunder testunder test
DOS test SW
USBUSB
Tester BoxTester BoxProgrammable USBProgrammable USB
DeviceDevice
USB Production Testing
Testing USB host root ports
Test Setup andTest Methodology
May 9, 2001 8
USB Production TestingTesting Any USB Ports
USBUSBUSBUSB
USB HCUSB HCunder testunder test
DOS test SW HubHub Tester BoxTester Box
Programmable Programmable USB DeviceUSB Device
May 9, 2001 9
USB Production Testing
Writing and reading all host controllers registers Host controller initialization FS and LS device enumeration FS and LS Data loop-back Device connect and disconnect Analog measurements of D+, D- and VCC
Test Coverage(USB Host Controller)
May 9, 2001 10
USB Production Testing
Hub enumeration FS and LS connect and disconnect events at
every downstream port FS and LS Data loop-back through each port Remote wakeup (all combinations) Power management (OC, PWR switching) Analog measurements of all downstream ports
Test Coverage(USB Hub)
May 9, 2001 11
USB Production Testing
Customers require control on what to test and on the Go / No Go values
Special test option to allow the test to pass even when there are known issues
API to enable 3rd party test utilities to use the same tester box
Test Configuration /Customization
May 9, 2001 12
USB Production Testing
Production line operator screen Debug screen Analog results screen USB setup topology report Detailed failure description Daily test report Daily statistical report
Test Results
May 9, 2001 13
USB Production Testing ; AutoReturnToDOS=Yes,1000 ; TypeOfPortsToBeTested=Root ; TypeOfUSBHostController=UHCI ; NumberOfPorts=1 ; EndOfTestSound=Off ; OHCIBaseAddress=D800 ; TestLog=Statistics DefaultScreen=Debug ; ConsoleMode=Yes ; UHCIPix4Irq=11 DisableTest=2,3,4,5,6,7,8,9,10,11,12,13 DisableFunctionKeys=9 ; EmbeddedPorts=2,3 ; HubTrafficIndicatorDuration=Yes,200 USBLineIdleHigh=3.10 USBLineIdleLow=0.11 USBLineDrivenHigh=3.15 USBLineDrivenLow=0.22
USBLineDrivenHigh=3.15 USBLineDrivenLow=0.22 CHigh=5.43 VCCLow=5.00 ; VCCLoad=700 ; OvercurrentValue=1500 ; OvercurrentDuration=300 ; PropagationDuration=200 RunTestKey=Space ; PIX3IOSpace ; PIX3IRQ PIX3Clock USBKeyboardEnabled=Yes PowerSwitchingDelay=30 ; AutoOCStartFrom=40 ; AutoOCIncreaseBy=1 ; AutoOCDelay=50
May 9, 2001 14
USB Production Testing
May 9, 2001 15
USB Production Testing
May 9, 2001 16
USB Production Testing
May 9, 2001 17
USB Production Testing
USB 2.0 specifics– Have to test 3 speeds– Have to talk to multiple host controllers
Challenges for split transactions for host testing– Cannot test unless a 2.0 hub is connected to the host
(or the host has an integrated hub)– It is not feasible to put a 2.0 hub on the tester– An option can be provided using an external 2.0 hub
between the host and a channel on the tester
New for 2.0
May 9, 2001 18
USB Production Testing
Unlike for HCs and Hubs, cannot be generalized Still want full Software control
– Minimize test time– Perform tasks that are hard to set up with target OS
driver/application for your device Modified Linux USB stack can help, have to do
modifications yourself Can use USB stack for DOS Can concentrate on testing the functionality
Testing USB Devices
May 9, 2001 19
USB Production Testing
Production test environment, with a focus of the specific issues that are related to testing USB (Host controllers and USB hubs)
Different test methods Configuration and customization requested by
USB product manufacturers Test coverage and test results
Summary