Yamaha YMF744B (DS-1S) specifications AC-link timing

YMF744B

4-5. AC-link (Fig.6)

Item	Symbol	Condition	Min.	Typ.	Max.	Unit
CBCLK Cycle Time	tCBICYC		-	81.4	-	ns
CBCLK High Time	tCBIHIGH		35	40.7	45	ns
CBCLK Low Time	tCBILOW		35	40.7	45	ns
CSYNC Cycle Time	tCSYCYC		-	20.8	-	ns
CSYNC High Time	tCSYHIGH		-	1.3	-	µs
CSYNC Low Time	tCSYLOW		-	19.5	-	µs
CBCLK to Signal Valid Delay	tCVAL	*13	-	-	20	ns
Output Hold Time for CBCLK	tCOH	*13	0	-	-	ns
Input Setup Time to CBCLK	tCISU	*14	15	-	-	ns
Input Hold Time for CBCLK	tCIH	*14	5	-	-	ns
Warm Reset Width			-	1.3	-	µs

Note) Top = 0-70°C, PVDD=3.3 ±0.3 V, VDD=3.3±0.3 V, CVDD=3.3±0.3 V, LVDD=3.3±0.3 V, CL=50 pF *13: This characteristic is applicable to CSYNC and CSDO signal.

*14: This characteristic is applicable to CSDI signal.

tCBICYC

	2.0 V
CBCLK	1.5 V
t CBIHIGH		0.8 V
	t CBILOW	t COH	t CSYLOW
t CVAL
		2.0 V
SYNC			1.5 V
		t CSYHIGH	0.8 V
		t CSYCYC
t CVAL	t	COH
CSDO		2.0 V
		0.8 V
t CISU	t CIH
CSDI		2.0 V
		0.8 V

Fig.6: AC-link timing

February 3, 1999

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