CYD18S72V CYPRESS [Cypress Semiconductor], CYD18S72V Datasheet - Page 22

• Manufacturer Part Number: CYD18S72V
• Description: FLEx72 3.3V 64K/128K/256K x 72 Synchronous Dual-Port RAM
• Manufacturer: CYPRESS [Cypress Semiconductor]

Document #: 38-06069 Rev. *D
Switching Waveforms
Notes:
47. CE
48. CNTINT is always driven.
49. CNTINT goes LOW when the unmasked portion of the address counter is incremented to the maximum value.
50. The mask register assumed to have the value of 1FFFFh.
51. Retransmit happens if the counter remains in increment mode after it wraps to initially loaded value.
Counter Interrupt and Retransmit
CNT/MSK
ADS
COUNTER
INTERNAL
ADDRESS
CNTEN
CLK
CNTINT
0
= OE = BE0 – BE7 = LOW; CE
t
SCM
1FFFC
t
CH2
t
HCM
t
CYC2
(continued)
1
t
CL2
= R/W = CNTRST = MRST = HIGH.
1FFFD
[47, 48, 49, 50, 51]
PRELIMINARY
1FFFE
t
SCINT
1FFFF
t
RCINT
Last_Loaded
Last_Loaded +1
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CYD09S72V
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