Sharp MZ-700 manual IV? 7ce

IV? 7ce

4-4. Memory controller (CRTC) circuit description

The memory controller and the CRTC are contained in the single chip custom LSI (M60719).

Memory controller signal description

				&
	Pin No.	Signal name	IN/OUT		Function	Circuit diagram
						signal name
1		AO		CPU address Bus		AO
	l	l	IN			l
16		A15				A15
17		LPH1	IN	Clock (17.7MHz)		<I>
18		PHI	IN	CPU clock (3.55MHz)		cp
19		CSEN	OUT	8255, 8253, joystick enable		CSE
10		CL	IN	GND		CL
21		GATE	IN	GND		GATE
22		CSON	OUT	Monitor ROM enable		CSO
23		VCC	-	Power supply		5V
24		RASN	OUT	D-RAM row address select		RAS
25		RFSN	IN	CPU refresh		RFSH
26		PHIO	OUT	CPU clock create signal (3.55MHz)		cpo
27		MRQN	IN	CPU memory request		MREQ
28		10RN	IN	CPU I/O request		IORQ
29		RDN	IN	CPU read		RD
20		WRN	IN	CPU write		WR
31		RSTN	IN	Reset		RESET
32		SEL	IN	DRAM row/column address switching signal		SEL
33		VBLN	OUT	Vertical blanking signal (CRT)		VBLK
34		HBLN	OUT	Horizontal blanking signal (CRT)		HBLK
35		WATN	OUT	CPU wait		WA
36		COLR	OUT	Colour sub-carrier wave (4,4361 875MHz: PAL)		COLR
37		PRCN	OUT	Printer I/O address select		PRC
38		Q1		Display: Address data output (Line Count Signals)		Ql
	l	l	OUT	(Display address is indicated to the CG ROM together		l
	40	Q3		with PO - PlO).		Q3
	41	NTPL	IN	NTSC/PAL system switching (PAL=L)		N/P
	42	BLNK	OUT	Timer clock		BLNK
	43	HSYN	OUT	Horizontal synchronizing signal		HSY
	44	ABC	OUT			ABC
	45	LOAD	OUT	Character, display start signal		LOAD
	46	PO	OUT	Display address signal		PO
	l	~				l
	52	P6				P6
	53	GND	-	GND
	54	P7		Display address signal		P7
	l	l	OUT			l
	57	PlO				PlO
	58	S157	OUT	V-RAM display/CPU address switching signal		S157
	59	SYNN	OUT	Vertical synchronizing signal		SYN
	60	CLKN	OUT	Character display shift register clock		CLK

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