Lucent Technologies manual Information Manual, Rev Evaluation Kit for USS-720

Information Manual, Rev. 1	Evaluation Kit for USS-720	Instant USB
September 1999	USB-to-IEEE	1284 Bridge

Table of Contents (continued)

USS-720 Instant USB USB-to-IEEE1284 Bridge Preliminary Data Sheet	......................... 5-1
Features	5-1
Description	5-1
Pin Information	5-3
Overview	5-5
USB Port	5-5
Device Descriptor, Configurations, and
Interfaces	5-5
Supported Descriptors	5-5
Descriptor Locations	5-5
Onboard Device Descriptor	5-6
Configuration Descriptor	5-7
Interface Descriptors	5-8
Interface 0, Alternate Setting 0 (I0:A0)	5- 8
Interface 0, Alternate Setting 1 (I0:A1)	5-9
Interface 0, Alternate Setting 2 (I0:A2)	5-10
Pipes	5-11
Control Pipe	5-11
Bulk In Pipe	5-11
Bulk Out Pipe	5-11
Interrupt Pipe	5-11
Interpipe Synchronization	5-11
Requests	5-11
Standard Requests	5-11
Printer Class-Specific Requests	5-12
GET_DEVICE_ID	5-12
GET_PORT_STATUS	5-12
SOFT_RESET	5-12
Vendor-Specific Requests	5-13
GET_1284_REGISTER	5-13
SET_1284_REGISTER	5-13
IEEE 1284 Port	5-14
Register-Based Operation	5-14
Standard Mode (000)	5-14
Bidirectional Mode (001)	5-14
Compatibility Mode (010)	5-14
ECP Mode (011)	5-14
EPP Mode (100)	5-14
Registers	5-15
Data Register	5-16
Status Register	5-16
Control Register	5-17
EPP Address Register	5-18
EPP Data Register	5-18
ECP Command Register	5-19
Extended Control Register	5-20
USS-720 Control Register	5-21
USS-720 Setup Register	5-22
Interrupts	5-23
nAck Interrupt	5-23
EPP Time-Out Interrupt	5-23

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