Lucent Technologies USS-720 manual Status Register Address Bit Symbol

Page 42

USS-720Instant USB

Preliminary Data Sheet, Rev. 5

USB-to-IEEE1284 Bridge

September 1999

IEEE 1284 Port (continued)

Data Register

Table 21. Data Register

Data Register

Address: 0

Bit

7

6

5

4

3

2

1

0

Symbol

D7

D6

D5

D4

D3

D2

D1

D0

Access

R/W

R/W

R/W

R/W

R/W

R/W

R/W

R/W

Default

0

0

0

0

0

0

0

0

Bit

Symbol

Bit Description

7—0

D7—D0

Data. This register is equivalent to and operates in the same manner as the Data

Register in a standard host-side parallel port controller chip. The register is writable

when Auto Mode is 0 and the Mode ﬁeld in the Extended Control Register is set to

000 or 001. It is always readable. The read value will be the value of the data latched

into the register unless the Mode ﬁeld is set to 001 and the Direction bit in the Control

Register is set to 1 (Input Mode). In this case, the read value will be the value present

on the parallel port data lines.

Status Register

Table 22. Status Register

Status Register

Address: 1

Bit

7

6

5

4

3

2

1

0

Symbol

nBusy

nAck

PError

Select

nFault

—

PLH

Timeout

Access

Read

Read

Read

Read

Read

Read

Read

Read

Default

X

X

X

X

X

X

X

0

Bit

Symbol

Bit Description

7

nBusy

Inverted Busy. An inverted version of the parallel port Busy signal.

6

nAck

Parallel Port nAck Signal.

5

PError

Parallel Port PError Signal.

4

Select

Parallel Port Select Signal.

3

nFault

Parallel Port nFault Signal.

2

—

Reserved.

1

PLH

Peripheral Logic High. The parallel port PLH signal.

0

Timeout

EPP Time-Out.This bit indicates that a time-out has occurred during an EPP read or

write. If the peripheral fails to respond to an EPP read or write for longer than 10 μs,

this bit will be set and an interrupt will be returned if interrupts are enabled. This bit is

cleared by a read.

5-16	Lucent Technologies Inc.

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Contents Introduction Information Manual, Rev SeptemberTable of Contents Information Manual, Rev Evaluation Kit for USS-720 September USB-to-IEEE BridgeUSS-720 USB Device Driver Preliminary User Guide IOCTL1284 TerminateIOCTLSET1284REGISTER USS-720 USB Port Monitor Application Note Evaluation Kit Contents Hardware Requirements \SAMPLESOSR2.1 Cable Installation Instructions Getting Started InstructionsSoftware Updates Windows 98 Cable Installation InstructionsUSB Driver and Port Monitor Plug and PlayPort Creation Eeprom Lucent Technologies Inc Lucent Technologies Microelectronics Group In-System Design, IncUSB Applications Support September February Evaluation Kit SoftwareUSS-720 Driver Software Object Code License Agreement IntroductionFurnishing of Licensed Software USS-720 Software Use Agreement FebruaryLicensed Software OwnershipUSS-720 February Software Use AgreementNothing Construed Warranty and IndemnityAgreement Prevails 04 ConﬁdentialityAddresses PublicityNonassignability IntegrationApplicable Law DisputesUSS720.SYS USS720.INFDocumentation USS-720 Software Use Agreement February Software Components Application Note, Rev FebruaryCustomer-Deﬁned Data Plug and Play Operation PnPPrinter Enumeration Operating Systems Supported Power ManagementInstallation Process USB Hardware Types SupportedPrinter Types Supported Print Types SupportedFeatures Preliminary Data Sheet, Rev SeptemberDescription Table of Contents Preliminary Data Sheet, Rev USS-720 Pin InformationUSB-to-IEEE Parallel Port nInit Signal Active-Low Parallel Port nAutoFd Signal Active-LowParallel Port nSelectIn Signal Active-Low Parallel Port nAck Signal Active-LowDevice Descriptor, Conﬁgurations, and Inter- faces OverviewUSB Port Descriptor LocationsUSB-to- Ieee 1284 Bridge September Onboard Device DescriptorDevice Descriptor Offset Field Size Value Description USB-to- Ieee Conﬁguration DescriptorInterface Descriptors Bulk Out Endpoint Descriptor, I0A0E1September USB-to-IEEE1284 Bridge Bulk Out Endpoint Descriptor, I0A1E1Bulk In Endpoint Descriptor, I0A1E2 Bulk Out Endpoint Descriptor, I0A2E1 Bulk In Endpoint Descriptor, I0A2E2Interrupt Endpoint Descriptor, I0A2E3 Pipes RequestsStandard Requests Printer Class-Speciﬁc Requests Get Port Status Data Bit DescriptionVendor-Speciﬁc Requests GET1284REGISTERSET1284REGISTER Ieee 1284 Port Register-Based OperationInterrupt Pipe Read Data RegistersGET1284REGISTER Data Byte Register Data Byte Register DataStatus Register Address Bit Symbol Default Bit Symbol Bit DescriptionParallel Port nFault Signal Reserved Parallel Port nInit Signal Control Register Address Bit SymbolAccess Default Bit Symbol Bit Description USB-to-IEEE1284 BridgeUSS-720Instant USB ECP Command Register Address Bit Symbol Access Extended Control Register Address Bit Symbol Mode20 DescriptionUSS-720 Control Register Address Bit Symbol USS-720 Setup Register Address Bit Symbol Interrupts External Circuitry Requirements External Crystal ConnectionSelf-Powered Mode Filter Bypass ModeHigh Drive Mode Absolute Maximum Ratings Parameter Symbol Min UnitCapacitance Values Parameter Unit Electrical CharacteristicsParameter Symbol Test Conditions Min Typ Max Unit Clklo ClkhiTiming Characteristics Setup and Hold Input Timing ParameterOutput Delay Timing Parameter Min Max Unit Pin Mqfp Outline DiagramOrdering Information Device Code Package ComcodeApplication Note February Description Bridging USB to Typical Circuit Showing ParallelPort USSLucent Technologies Inc Signal Directions Preliminary User Guide, Rev FebruaryIOCTL1284 Setmode Preliminary User Guide, Rev USS-720 February InitializationO File Functions USB Device DriverCreateFile Error Codes ReadFileWriteFile DeviceIoControl CloseHandle O Control Codes Control Code DescriptionIOCTL1284 Ecpfwdtorev ParametersIOCTL1284ECPREVTOFWD IOCTL1284 Ecpsetchannel Register Mode Description IOCTL1284 SetmodeIOCTL1284 Terminate Bulkoutpipe IoctlabortpipeValue Description BulkinpipeIoctlcancelpiperequest IOCTLGET1284REGISTER ALTINTERFACE1 IoctlgetaltsettingALTINTERFACE0 ALTINTERFACE2Ioctlgetcapabilities Ioctlgetconfigurationdescriptor Ioctlgetdevicedescriptor Ioctlgetdeviceinstances Ioctlgetinterface Ioctlgetportstatus Bit MeaningIOCTLISSUEUSS720COMMAND Command DescriptionIoctlreadinterruptpipe Byte DescriptionIoctlresetpipe IOCTLSET1284REGISTER Ioctlsetaltsetting Ioctlsoftreset Deviceinstance O Control Data StructuresDeviceinstanceheader Data StructureREGISTER1284 REGISTER1284, *PREGISTER1284ADVREGISTER1284 ADVREGISTER1284, *PADVREGISTER1284Lucent Technologies Inc USS-720 USB Port Monitor USS-720 Application Note USB Port Monitor February Printer Cable with Instant USBApplication Note June Software Installation InstructionsW98USS720EvalKit2402.zip to download the installation ﬁles Click on Enter LibrarySeptember MN99-052CMPR-1 Replaces MN97-061CMPR-04