SCD1284 INTEL [Intel Corporation], SCD1284 Datasheet - Page 3

• Manufacturer Part Number: SCD1284
• Description: IEEE 1284-Compatible Parallel Interface Controller with Two High-Speed Asynchronous Serial Ports
• Manufacturer: INTEL [Intel Corporation]

Contents
1.0
2.0
3.0
4.0
5.0
Datasheet
Overview
Conventions
2.1
2.2
Pin Information
3.1
3.2
Register Summary
4.1
4.2
Functional Description
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5.9
Abbreviations.......................................................................................................15
Acronyms ............................................................................................................15
Pin Diagram.........................................................................................................17
Pin List.................................................................................................................18
Register Summary Tables...................................................................................24
Register Usage....................................................................................................27
Device Architecture .............................................................................................31
CPU Interface......................................................................................................33
5.2.1
5.2.2
5.2.3
5.2.4
Serial Port Service Requests ..............................................................................35
5.3.1
5.3.2
5.3.3
5.3.4
Parallel Port Service Requests............................................................................43
5.4.1
5.4.2
Serial Data Reception and Transmission ............................................................49
5.5.1
5.5.2
5.5.3
5.5.4
Flow Control ........................................................................................................55
5.6.1
5.6.2
5.6.3
5.6.4
Receive Special Character Processing ...............................................................61
5.7.1
5.7.2
Transmit Special Character Processing ..............................................................67
5.8.1
5.8.2
5.8.3
Baud Rate Generation.........................................................................................72
......................................................................................................................12
Read Cycles ...........................................................................................33
Write Cycles ...........................................................................................34
Service-Acknowledge Cycles .................................................................34
DMA Cycles............................................................................................34
Interrupts ................................................................................................36
DMAREQ* as Parallel Interrupt Source..................................................36
Serial Service Request Polling ...............................................................40
Daisy-Chaining Service Requests with CD1400s ..................................41
Hardware-Activated Context Switch, Parallel.........................................48
Software-Activated Context Switch, Parallel ..........................................49
Receiver Operation ................................................................................50
Receiver Timer Operations ....................................................................51
Receive Exceptions................................................................................52
Transmitter Operation ............................................................................54
In-Band Flow Control..............................................................................55
Receiver In-Band Flow Control ..............................................................55
Out-of-Band Flow Control.......................................................................58
Modem Signals and General-Purpose I/O .............................................59
UNIX‚ Character Processing ..................................................................61
Non-UNIX‚ Receive Special Character Processing................................63
Line Terminating Characters ..................................................................67
Embedded Transmit Commands............................................................67
Send Special Character Command........................................................68
...............................................................................................................15
..........................................................................................................17
IEEE 1284-Compatible Parallel Interface Controller — CD1284
...................................................................................................24
...........................................................................................31
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