Cypress CY7C68013A manual Data Memory Read, CLKOUT17

CY7C68013A, CY7C68014A CY7C68015A, CY7C68016A

10.3 Data Memory Read

tCL

Figure 13. Data Memory Read Timing Diagram

Stretch = 0

CLKOUT[17]

	tAV		tAV
A[15..0]
	tSTBL		tSTBH
RD#
	tSCSL
CS#
OE#	tSOEL
	[19]	tDSU	tDH
D[7..0]	tACC1
		data in

CLKOUT[17]

A[15..0]

RD#

CS#

D[7..0]

tCL	Stretch = 1
tAV
	[19]	tDSU	tDH
	tACC1	data in

Table 16. Data Memory Read Parameters

Parameter	Description	Min	Typ	Max	Unit	Notes
tCL	1/CLKOUT Frequency		20.83		ns	48 MHz
			41.66		ns	24 MHz
			83.2		ns	12 MHz
tAV	Delay from Clock to Valid Address			10.7	ns
tSTBL	Clock to RD LOW			11	ns
tSTBH	Clock to RD HIGH			11	ns
tSCSL	Clock to CS LOW			13	ns
tSOEL	Clock to OE LOW			11.1	ns
tDSU	Data Setup to Clock	9.6			ns
tDH	Data Hold Time	0			ns

When using the AUTPOPTR1 or AUTOPTR2 to address external memory, the address of AUTOPTR1 is only active while either RD# or WR# are active. The address of AUTOPTR2 is active throughout the cycle and meets the above address valid time for which is based on the stretch value

Note

19.tACC2 and tACC3 are computed from the above parameters as follows: tACC2(24 MHz) = 3*tCL – tAV –tDSU= 106 ns

tACC2(48 MHz) = 3*tCL – tAV – tDSU = 43 ns tACC3(24 MHz) = 5*tCL – tAV –tDSU= 190 ns tACC3(48 MHz) = 5*tCL – tAV – tDSU = 86 ns.

Document #: 38-08032 Rev. *L Page 39 of 62

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