SCD1284 INTEL [Intel Corporation], SCD1284 Datasheet - Page 8
SCD1284
Manufacturer Part Number
SCD1284
Description
IEEE 1284-Compatible Parallel Interface Controller with Two High-Speed Asynchronous Serial Ports
Manufacturer
INTEL [Intel Corporation]
Datasheet
1.SCD1284.pdf
(176 pages)
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Part Number:
SCD128410QCE
Manufacturer:
INTEL
Quantity:
20 000
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CD1284 — IEEE 1284-Compatible Parallel Interface Controller
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Functional Block Diagram ................................................................................... 11
CD1284 Sample System Block Diagram ............................................................ 14
CD1284 Functional Block Diagram ..................................................................... 32
Internal Address Generation ............................................................................... 32
Control Signal Generation................................................................................... 38
CD1284 Daisy-Chain Connections ..................................................................... 42
Interrupt Generation Logic .................................................................................. 45
FIFO Timer Processing ....................................................................................... 53
CD1284 Receive Character Processing ............................................................. 64
CD1284 Transmit Character Processing ............................................................ 70
FIFO Data Path Functional Diagram — Receive ................................................ 78
FIFO Data Path Functional Diagram — Transmit ............................................... 80
Cable Connection................................................................................................ 85
External Buffer Control........................................................................................ 86
Intel‚ 80x86 Family Interface ............................................................................... 87
Motorola‚ 68020 Interface ................................................................................... 88
National Semiconductor‚ 32000 Interface ........................................................... 89
Flow Diagram of CD1284 Master Initialization Sequence................................... 92
Polling Flow Chart ............................................................................................. 100
Reset Timing ..................................................................................................... 158
Clock Timing ..................................................................................................... 159
Asynchronous Read Cycle Timing .................................................................... 159
Asynchronous Write Cycle Timing .................................................................... 160
Asynchronous Service Acknowledge Cycle Timing .......................................... 161
Asynchronous DMA Read Cycle Timing ........................................................... 162
Asynchronous DMA Read Cycle Timing (Two Back-to-Back DMA Reads) ...... 162
Asynchronous DMA Write Cycle Timing ........................................................... 163
Asynchronous DMA Write Cycle Timing (Two Back-to-Back DMA Writes)....... 163
Synchronous Read Cycle Timing...................................................................... 165
Synchronous Write Cycle Timing ...................................................................... 166
Synchronous Service Acknowledge Cycle Timing ............................................ 167
Synchronous DMA Write Cycle Timing
(Two Back-to-Back 3-Cycle DMA Writes) ......................................................... 168
Synchronous DMA Read Cycle Timing
(Two Back-to-Back 3-Cycle DMA Reads) ......................................................... 168
UART to RS232 and IR Port Interface Motherboard Example Schematic ........ 172
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