Home  Back
Last update: 4 January 2004

IC number:WD33C93, WD33C93A
IC function:SCSI Bus Interface Controller
Related components:NCR53C710 (SCSI-II controller)

Component documentation
IC numberManufacturerDocumentation
WD33C93, WD33C93AWestern DigitalA590 system schematics

Component versions
ComponentPackageCBM part numberCBM part description
WD33C93-PL40-Pin DIP390206-01WD33C93
WD33C93A-PL40-Pin DIP390206-03WD33C93A

Positions
DevicePositionComponentPackage
A3000U800WD33C93DIP
A3000TU800WD33C93ADIP
A2090U49WD33C93DIP
A2090AU49WD33C93DIP
A2091U4WD33C93DIP
A590U4WD33C93DIP

Pinout
PinTypeFunction groupNameSignal name
A3000, A3000TA2090, A2090AA2091, A590
1I/OSCSI interfaceI/OConnected to pin 50 of internal SCSI connector and pin 20 of external SCSI connector
2I/OSCSI interface_MSGConnected to pin 42 of internal SCSI connector and pin 2 of external SCSI connector
3PowerMiscellaneousVSSGND
4I/OSCSI interface_C/DConnected to pin 46 of internal SCSI connector and pin 15 of external SCSI connector
5I/OSCSI interface_BSYConnected to pin 36 of internal SCSI connector and pin 6 of external SCSI connector
6I/OSCSI interface_SELConnected to pin 44 of internal SCSI connector and pin 19 of external SCSI connector
7InputProcessor/DMA interfaceCLK14M_7M7M
8I/OProcessor/DMA interface_DRQ/DRQ_DREQ_DRQ_SDREQ
9I/OProcessor/DMA interface_DACK/_RCS_DACK_SDACK
10OutputProcessor/DMA interfaceINTRQINTS_INTP via U6INTS
11..18I/OProcessor/DMA interfaceD0..D7Connected to PD0..PD7 of Super DMACHD0..HD7SD0..SD7
19InputProcessor/DMA interfaceA0A(1)SA0SA(1)
20PowerMiscellaneousVSSGND
21InputProcessor/DMA interface_CS_CSS
22I/OProcessor/DMA interface_WE_IOW_WE_IOW
23I/OProcessor/DMA interface_RE_IOR_RE_IOR
24InputProcessor/DMA interfaceALEGND
25I/OSCSI interface_DBPConnected to pin 18 of internal SCSI connector and pin 20 of external SCSI connector
26..27I/OSCSI interface_DB0.._DB1Connected to pins 2,4 of internal SCSI connector and pins 8,21 of external SCSI connector
28PowerMiscellaneousVSSGND
29..34I/OSCSI interface_DB2.._DB7Connected to pins 6,8,10,12,14,16 of internal SCSI connector and pins 22,10,23,11,12,13 of external SCSI connector
35PowerMiscellaneousVSSGND
36InputProcessor/DMA interface_MR_IORST_MRESET_RESET
37I/OSCSI interface_ATNConnected to pin 32 of internal SCSI connector and pin 17 of external SCSI connector
38I/OSCSI interface_ACKConnected to pin 38 of internal SCSI connector and pin 5 of external SCSI connector
39I/OSCSI interface_REQConnected to pin 48 of internal SCSI connector and pin 1 of external SCSI connector
40PowerMiscellaneousVCC+5VVCC

Copyright © 2003-2004 Ronald van Dijk - All rights reserved