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

Component documentation

IC number	Manufacturer	Documentation
WD37C65		Not available
FDC37C65	SMC (now SMSC)	Not available

Component versions

Component	Package	CBM part number	CBM part description
WD37C65	40-Pin DIP	390304-01	IC, WD37C65
WD37C65A	40-Pin DIP	390304-02	IC, WD37C65A
WD37C65B, FDC37C65B	40-Pin DIP	390304-03	37C65B FDC
WD37C65C-PL	40-Pin DIP
WD37C65	44-Pin PLCC	390304-04	WD37C65 FCC Controller PLCC Pkg
WD37C65C-JM	44-Pin PLCC

Positions

Device	Position	Component	Package
A2286 sandwich board	U71	WD37C65, FDC37C65B, WD37C65C	DIP
A2386	U501	WD37C65C	PLCC
PC30-III	U1001	WD37C65, WD37C65A, WD37C65B	DIP
PC40-III	U1001	WD37C65, WD37C65A, WD37C65B, FDC37C65B	DIP
PC60-III	U127	WD37C65B	DIP
SL286/SL386SX main board	U305	WD37C65	PLCC

Pinout DIP package

Pin	Type	Name	Description
1	Input	RD_	READ
2	Input	WR_	WRITE
3	Input	CS_	CHIP SELECT
4	Input	A0	ADDRESS LINE
5	Input	DACK_	DMA ACKNOWLEDGE
6	Input	TC	TERMINAL COUNT
7..14	I/O	DB0..DB7	DATABUS 0 .. DATABUS 7
15	Output	DMA	DIRECT MEMORY ACCESS
16	Output	IRQ	INTERRUPT
17	Input	LDOR_	LOAD OPERATIONS REGISTER
18	Input	LDCR_	LOAD CONTROL REGISTER
19	Input	RST	RESET
20	Input	RDD_	READ DISK DATA
21	Input	CLK2	CLOCK2
22	Input	DRV	DRIVE TYPE
23	Input	CLK1	CLOCK1
24	Input	PCVAL	PRECOMPENSATION VALUE
25	Output	HS_	HEAD SELECT
26	Output	WE_	WRITE ENABLE
27	Output	WD_	WRITE DATA
28	Output	DIRC_	DIRECTION
29	Output	STEP_	STEP PULSE
30	Output	DS1_	DRIVE SELECT 1
31	Power	VSS	GROUND
32	Output	DS2_	DRIVE SELECT 2
33	Output	MO1_,DS3_	MOTOR ON 1, DRIVE SELECT 3
34	Output	MO2_,DS4_	MOTOR ON 2, DRIVE SELECT 4
35	Output	HDL_	HEAD LOADED
36	Output	RWC_,RPM_	REDUCED WRITE CURRENT, REVOLUTIONS PER MINUTE
37	Input	WP_	WRITE PROTECTED
38	Input	TR00_	TRACK 00
39	Input	IDX_	INDEX
40	Power	VCC	+5VDC

Pinout PLCC package

Pin	Type	Name	Description
1	Input	RD_	READ
2	Input	WR_	WRITE
3	Input	CS_	CHIP SELECT
4	Input	A0	ADDRESS LINE
5	Input	DACK_	DMA ACKNOWLEDGE
6	Input	TC	TERMINAL COUNT
7..14	I/O	DB0..DB7	DATABUS 0 .. DATABUS 7
15	Output	DMA	DIRECT MEMORY ACCESS
16	Output	IRQ	INTERRUPT
17	N/C	NC
18	Input	LDOR_	LOAD OPERATIONS REGISTER
19	Input	LDCR_	LOAD CONTROL REGISTER
20	Input	RST	RESET
21	Input	RDD_	READ DISK DATA
22	Output	XT2_	XTAL2
23	Input	XT2	XTAL2
24	Input	DRV	DRIVE TYPE
25	Output	XT1_	XTAL1
26	Input	XT1	XTAL1
27	Input	PCVAL	PRECOMPENSATION VALUE
28	Output	HS_	HEAD SELECT
29	Output	WE_	WRITE ENABLE
30	Output	WD_	WRITE DATA
31	Output	DIRC_	DIRECTION
32	Output	STEP_	STEP PULSE
33	Output	DS1_	DRIVE SELECT 1
34	Power	VSS	GROUND
35	Output	DS2_	DRIVE SELECT 2
36	Output	MO1_,DS3_	MOTOR ON 1, DRIVE SELECT 3
37	Output	MO2_,DS4_	MOTOR ON 2, DRIVE SELECT 4
38	Output	HDL_	HEAD LOADED
39	Output	RWC_,RPM_	REDUCED WRITE CURRENT, REVOLUTIONS PER MINUTE
40	N/C	NC
41	Input	WP_	WRITE PROTECTED
42	Input	TR00_	TRACK 00
43	Input	IDX_	INDEX
44	Power	VCC	+5VDC