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Information Manual, Rev. 1 Evaluation Kit for USS-720
Instant USB
September 1999 USB-to-
IEEE
1284 Bridge
Lucent Technologies Inc. 1-3
13
Table of Contents (continued)
USS-720
Instant USB
USB-to-
IEEE
1284 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