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CRTC used in Commodore and Amiga equipment

IC number

6545-1, 6845, 46505

IC function

CRTC (CRT Controller)

Related components

8563, 8568, PVC4 (extended versions), PVGA, WD90C11 (VGA controllers), PVC2 (color add-on)

Component documentation

IC number	Manufacturer	Documentation
6545-1	MOS Technology / CSG	Not available
MC6845	Motorola	Not available
HD46505	Hitachi	Not available

Component versions

IC number	Package	Speed
6545-1	40-Pin DIP	1 MHz
6545A-1	40-Pin DIP	2 MHz
MC6845P	40-Pin DIP	1 MHz
MC68B45P	40-Pin DIP	2 MHz
HD46505	40-Pin DIP

CBM part numbers

Speed	CBM part number	CBM part description
1 MHz	901479-01	CRT Controller
2 MHz	901479-02	IC 6545A-1 CRT-Controller

Positions

Device	Positions	Package	Speed
PC-I	U50	DIP	1 MHz
PET board assy 8032030	UB13	DIP	1 MHz
PET board assy 8032080	UB13	DIP	1 MHz
PET board assy 8032090	UB13	DIP	1 MHz
CBM II lo-profile	U7	DIP	2 MHz
CBM II hi-profile	U10	DIP	2 MHz
PC-10 Monochrome video adapter	U9	DIP	2 MHz

Pinout

Pin	Type	Name
1	Power	GND
2	Input	RES_
3	Input	LPEN
4..11 (6545)	Output	CC0/MA0..CC7/MA7
12..17 (6545)	Output	CR0/MA8..CR5/MA13
4..17 (not 6545)	Output	MA0..MA13
18	Output	DISPLAY ENABLE
19	Input	CURSOR
20	Power	VCC
21	Input	CCLK
22	Input	R/W_
23	Input	Ø2
24	Input	RS
25	Input	CS_
26..33	I/O	DB7..DB0
34..38	Output	RA4..RA0
39	Output	HSYNC
40	Output	VSYNC

Copyright © 2004 Ronald van Dijk - All rights reserved
Last update: 7 August 2004