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Last update: 25 October 2004

IC number:37C65
IC function:FDC (Floppy Disk Controller)
Related components:FDC9268, µPD765

Component documentation
IC numberManufacturerDocumentation
WD37C65Western DigitalNot available
FDC37C65SMC (now SMSC)Not available

Component versions
ComponentPackageCBM part numberCBM part description
WD37C6540-Pin DIP390304-01IC, WD37C65
WD37C65A40-Pin DIP390304-02IC, WD37C65A
WD37C65B, FDC37C65B40-Pin DIP390304-0337C65B FDC
WD37C65C-PL40-Pin DIP
WD37C6544-Pin PLCC390304-04WD37C65 FCC Controller PLCC Pkg
WD37C65C-JM44-Pin PLCC

Positions
DevicePositionComponentPackage
A2286 sandwich boardU71WD37C65, FDC37C65B, WD37C65CDIP
A2386U501WD37C65CPLCC
PC30-IIIU1001WD37C65, WD37C65A, WD37C65BDIP
PC40-IIIU1001WD37C65, WD37C65A, WD37C65B, FDC37C65BDIP
PC60-IIIU127WD37C65BDIP
SL286/SL386SX main boardU305WD37C65PLCC

Pinout DIP package
PinTypeNameDescription
1InputRD_READ
2InputWR_WRITE
3InputCS_CHIP SELECT
4InputA0ADDRESS LINE
5InputDACK_DMA ACKNOWLEDGE
6InputTCTERMINAL COUNT
7..14I/ODB0..DB7DATABUS 0 .. DATABUS 7
15OutputDMADIRECT MEMORY ACCESS
16OutputIRQINTERRUPT
17InputLDOR_LOAD OPERATIONS REGISTER
18InputLDCR_LOAD CONTROL REGISTER
19InputRSTRESET
20InputRDD_READ DISK DATA
21InputCLK2CLOCK2
22InputDRVDRIVE TYPE
23InputCLK1CLOCK1
24InputPCVALPRECOMPENSATION VALUE
25OutputHS_HEAD SELECT
26OutputWE_WRITE ENABLE
27OutputWD_WRITE DATA
28OutputDIRC_DIRECTION
29OutputSTEP_STEP PULSE
30OutputDS1_DRIVE SELECT 1
31PowerVSSGROUND
32OutputDS2_DRIVE SELECT 2
33OutputMO1_,DS3_MOTOR ON 1, DRIVE SELECT 3
34OutputMO2_,DS4_MOTOR ON 2, DRIVE SELECT 4
35OutputHDL_HEAD LOADED
36OutputRWC_,RPM_REDUCED WRITE CURRENT, REVOLUTIONS PER MINUTE
37InputWP_WRITE PROTECTED
38InputTR00_TRACK 00
39InputIDX_INDEX
40PowerVCC+5VDC

Pinout PLCC package
PinTypeNameDescription
1InputRD_READ
2InputWR_WRITE
3InputCS_CHIP SELECT
4InputA0ADDRESS LINE
5InputDACK_DMA ACKNOWLEDGE
6InputTCTERMINAL COUNT
7..14I/ODB0..DB7DATABUS 0 .. DATABUS 7
15OutputDMADIRECT MEMORY ACCESS
16OutputIRQINTERRUPT
17N/CNC
18InputLDOR_LOAD OPERATIONS REGISTER
19InputLDCR_LOAD CONTROL REGISTER
20InputRSTRESET
21InputRDD_READ DISK DATA
22OutputXT2_XTAL2
23InputXT2XTAL2
24InputDRVDRIVE TYPE
25OutputXT1_XTAL1
26InputXT1XTAL1
27InputPCVALPRECOMPENSATION VALUE
28OutputHS_HEAD SELECT
29OutputWE_WRITE ENABLE
30OutputWD_WRITE DATA
31OutputDIRC_DIRECTION
32OutputSTEP_STEP PULSE
33OutputDS1_DRIVE SELECT 1
34PowerVSSGROUND
35OutputDS2_DRIVE SELECT 2
36OutputMO1_,DS3_MOTOR ON 1, DRIVE SELECT 3
37OutputMO2_,DS4_MOTOR ON 2, DRIVE SELECT 4
38OutputHDL_HEAD LOADED
39OutputRWC_,RPM_REDUCED WRITE CURRENT, REVOLUTIONS PER MINUTE
40N/CNC
41InputWP_WRITE PROTECTED
42InputTR00_TRACK 00
43InputIDX_INDEX
44PowerVCC+5VDC

Copyright © 2004 Ronald van Dijk - All rights reserved