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SCD1284 Datasheet(PDF) 4 Page - Intel Corporation

Part # SCD1284
Description  IEEE 1284-Compatible Parallel Interface Controller with Two High-Speed Asynchronous Serial Ports
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Manufacturer  INTEL [Intel Corporation]
Direct Link  http://www.intel.com
Logo INTEL - Intel Corporation

SCD1284 Datasheet(HTML) 4 Page - Intel Corporation

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CD1284 — IEEE 1284-Compatible Parallel Interface Controller
4
Datasheet
5.10
Serial Diagnostic Facilities — Loopback ............................................................. 73
5.11
Parallel Port FIFO and Data Pipeline Overview .................................................. 73
5.11.1 IEEE STD 1284 Protocols ...................................................................... 73
5.11.2 Bus Interface .......................................................................................... 74
5.11.3 Parallel Port FIFO .................................................................................. 74
5.11.4 Receive Direction ................................................................................... 75
5.11.5 Receiving Compressed Data.................................................................. 75
5.11.6 Stale Data (Stale, OneChar, and Timeout Status Bits) .......................... 76
5.11.7 Transmit Direction .................................................................................. 76
5.12
CD1284 Parallel Port Overview .......................................................................... 77
5.12.1 Terminology ........................................................................................... 77
5.12.2 Signal Names ......................................................................................... 77
5.12.3 State Machine ........................................................................................ 78
5.12.4 Configuration .......................................................................................... 78
5.12.5 Interrupts ................................................................................................ 79
5.12.6 Manual Mode ......................................................................................... 79
5.12.7 Control Signals....................................................................................... 79
5.12.8 Parallel Port Interface to the FIFO ......................................................... 80
5.12.9 1284 Negotiations .................................................................................. 80
5.12.10 Data Transfers ....................................................................................... 81
5.12.11 Compatible Mode Status ........................................................................ 81
5.13
1284 Parallel Protocol Support ........................................................................... 82
5.13.1 Compatibility Mode................................................................................. 82
5.13.2 Reverse-Nibble and Reverse-Byte Modes ............................................. 82
5.13.3 ID Request ............................................................................................. 82
5.13.4 ECP Mode .............................................................................................. 82
5.13.5 EPP Mode .............................................................................................. 83
5.14
Protocol Timing ................................................................................................... 83
5.15
General-Purpose I/O Port ................................................................................... 83
5.16
Parallel Port Interface.......................................................................................... 84
5.17
Hardware Configurations .................................................................................... 86
5.17.1 Interfacing to an Intel‚ Microprocessor-Based System ........................... 86
5.17.2 Interfacing to a Motorola‚ Microprocessor-Based System...................... 86
5.17.3 Interfacing to a National Semiconductor‚
Microprocessor-Based System86
6.0
Programming ............................................................................................................. 90
6.1
Overview ............................................................................................................. 90
6.2
Initialization ......................................................................................................... 90
6.2.1
Device Reset .......................................................................................... 90
6.2.2
Global Function Initialization .................................................................. 93
6.2.3
Serial Channel Initialization .................................................................... 93
6.3
Serial Poll Mode Examples ................................................................................. 94
6.3.1
Polling Routine Examples ...................................................................... 94
6.4
Hardware-Activated Service Examples............................................................... 97
6.4.1
Serial Receive Service ........................................................................... 97
6.4.2
Serial Transmit Service .......................................................................... 98
6.4.3
Modem Service ...................................................................................... 99
6.5
Parallel Channel Service Routines...................................................................... 99
6.5.1
Software-Activated Service Examples (Poll) ........................................ 100


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