ECP vs. EPP - Specifications
- Document ID: 95080001
- Posted Date: 1998-05-01
- Last Updated: 1998-05-01
- Distribution: View Public Website
- Applicable Models
Satellite 100CS Satellite 110CS Satellite 110CT Satellite 200CDS Satellite 305CDS Portege 300CT Portege 610CT Portege 620CT Portege 650CT Portege 660CDT Tecra 500CDT Tecra 500CS Tecra 510CDT Tecra 520CDT Tecra 530CDT Tecra 550CDT Tecra 700CS Tecra 700CT Tecra 710CDT Tecra 720CDT Tecra 730CDT Tecra 730XCDT Tecra 740CDT Satellite Pro 400CDT Satellite Pro 400CS Satellite Pro 410CDT Satellite Pro 410CS Satellite Pro 415CS Satellite Pro 420CDS Satellite Pro 420CDT Satellite Pro 430CDS Satellite Pro 430CDT Satellite Pro 440CDT Satellite Pro 440CDX
- Information
- Brief specifications for comparing the ECP parallel port (on late model Toshiba computers) and EPP parallel port hardware.
EPP - Enhanced Parallel Port
- 1-3 MB/sec
- Asynchronous, interlocked, bi-directional communication - Half Duplex Operation
- Targeted at register oriented type devices:
- Network Adapters
- Tape backup
- CD-ROM
- Master/slave architecture
- Peripheral is polled for data
- Supports peripheral interrupt
- Supports two cycle types:
- Address/command
- Data
- Symmetric Read/Write cycles
- Hardware assisted handshaking/data transfer
- Limited by I/O cycle capabilities of the implementation
ECP - Extended Capability Port
- 5 MB/Sec
- Asynchronous, interlocked, bi-directional communication - Half Duplex Operation
- Targeted at block oriented type devices:
- Printers
- Scanners
- May have hardware support for RLE compression or decompression (optional)
- Supports 2 cycle types:
- Channel Address
- Data
- Peer to 'Peerish'
- Peripheral may request the reverse channel, but the host controls the data transfer
- Hardware assisted handshaking/data transfer
- Implementations include DMA as well as programmed I/O PC interface
- Export Control and EULA
- Use of any software made available for download from this system constitutes your acceptance of the Export Control Terms and the terms in the Dynabook end-user license agreement both of which you can view before downloading any such software.