background image

 

CY7C09079V/89V/99V

CY7C09179V/89V/99V

Document #: 38-06043 Rev. *C

Page 8 of 21

Switching Waveforms

 (continued)

Figure 6.  Read Cycle for Flow-Through Output (FT/PIPE = V

IL

)

[16, 17, 18, 19]

Notes

16. OE is asynchronously controlled; all other inputs are synchronous to the rising clock edge.
17. ADS = V

IL

, CNTEN and CNTRST = V

IH

.

18. The output is disabled (high-impedance state) by CE

0

=V

IH

 or CE

1

 = V

IL

 following the next rising edge of the clock.

19. Addresses do not have to be accessed sequentially since ADS = V

IL

 constantly loads the address on the rising edge of the CLK. Numbers are for reference 

only.

t

CH1

t

CL1

t

CYC1

t

SC

t

HC

t

DC

t

OHZ

t

OE

t

SC

t

HC

t

SW

t

HW

t

SA

t

HA

t

CD1

t

CKHZ

t

DC

t

OLZ

t

CKLZ

A

n

A

n+1

A

n+2

A

n+3

Q

n

Q

n+1

Q

n+2

CLK

CE

0

CE

1

R/W

ADDRESS

DATA

OUT

OE

[+] Feedback 

Summary of Contents for CY7C09079V

Page 1: ...A typical Standby 10 A typical Fully synchronous interface for easier operation Burst counters increment addresses internally Shorten cycle times Minimize bus noise Supported in Flow Through and Pipel...

Page 2: ...ort s burst counter is loaded with the port s Address Strobe ADS When the port s Count Enable CNTEN is asserted the address counter increments on each LOW to HIGH transition of that port s clock signa...

Page 3: ...R A11R NC NC CE1R CNTRSTR R WR OER FT PIPER GND NC A16R 58 57 56 55 54 53 52 51 NC NC A7L A8L A9L A10L A15L A12L A14L VCC NC NC CE0L A13L A11L NC NC CE1L CNTRSTL R WL OEL FT PIPEL NC NC A16L 17 16 15...

Page 4: ...n the address pins CE0L CE1L CE0R CE1R Chip Enable Input To select either the left or right port both CE0 AND CE1 must be asserted to their active states CE0 VIL and CE1 VIH CLKL CLKR Clock Signal Thi...

Page 5: ...eter Description CY7C09079V 89V 99V CY7C09179V 89V 99V Unit 6 1 7 1 9 12 Min Typ Max Min Typ Max Min Typ Max Min Typ Max VOH Output HIGH Voltage VCC Min IOH 4 0 mA 2 4 2 4 2 4 2 4 V VOL Output LOW Vol...

Page 6: ...R2 435 C 30 pF VTH 1 4V OUTPUT C 30 pF b Th venin Equivalent Load 1 c Three State Delay Load 2 R1 590 R2 435 3 3V OUTPUT C 5 pF RTH 250 Used for tCKLZ tOLZ tOHZ including scope and jig VTH 1 4V OUTPUT...

Page 7: ...ime 3 5 4 4 4 ns tHA Address Hold Time 0 0 1 1 ns tSC Chip Enable Set Up Time 3 5 4 4 4 ns tHC Chip Enable Hold Time 0 0 1 1 ns tSW R W Set Up Time 3 5 4 4 4 ns tHW R W Hold Time 0 0 1 1 ns tSD Input...

Page 8: ...dge 17 ADS VIL CNTEN and CNTRST VIH 18 The output is disabled high impedance state by CE0 VIH or CE1 VIL following the next rising edge of the clock 19 Addresses do not have to be accessed sequentiall...

Page 9: ...ed tCH2 tCL2 tCYC2 tSC tHC tSW tHW tSA tHA An An 1 CLK CE0 CE1 R W ADDRESS DATAOUT OE An 2 An 3 tSC tHC tOHZ tOE tOLZ tDC tCD2 tCKLZ Qn Qn 1 Qn 2 1 Latency D3 D1 D0 D2 A0 A1 A2 A3 A4 A5 D4 A0 A1 A2 A3...

Page 10: ...port write to flow through left port read 23 CE0 and ADS VIL CE1 CNTEN and CNTRST VIH 24 OE VIL for the right port which is being read from OE VIH for the left port which is being written to 25 It tC...

Page 11: ...e 10 Pipelined Read to Write to Read OE VIL 19 26 27 28 Switching Waveforms continued tCYC2 tCL2 tCH2 tHC tSC tHW tSW tHA tSA tHW tSW tCD2 tCKHZ tSD tHD tCKLZ tCD2 NO OPERATION WRITE READ READ CLK CE0...

Page 12: ...ous cycle control signals 27 CE0 and ADS VIL CE1 CNTEN and CNTRST VIH 28 During No Operation data in memory at the selected address may be corrupted and should be re written to ensure data integrity S...

Page 13: ...orms continued tCH1 tCL1 tCYC1 tSC tHC tSW tHW tSA tHA tSW tHW tSD tHD An An 1 An 2 An 2 An 3 An 4 Dn 2 Qn Qn 1 Qn 3 tCD1 tCD1 tDC tCKHZ tCD1 tCD1 tCKLZ tDC READ NO OPERATION WRITE READ CLK CE0 CE1 AD...

Page 14: ...Switching Waveforms continued COUNTER HOLD READ WITH COUNTER tSA tHA tSAD tHAD tSCN tHCN tCH2 tCL2 tCYC2 tSAD tHAD tSCN tHCN Qx 1 Qx Qn Qn 1 Qn 2 Qn 3 tDC tCD2 READ WITH COUNTER READ EXTERNAL ADDRESS...

Page 15: ...CNTRST VIH 31 The Internal Address is equal to the External Address when ADS VIL and equals the counter output when ADS VIH Switching Waveforms continued tCH2 tCL2 tCYC2 An An 1 An 2 An 3 An 4 Dn 1 Dn...

Page 16: ...sts during counter reset A READ or WRITE cycle may be coincidental with the counter reset Switching Waveforms continued tCH2 tCL2 tCYC2 CLK ADDRESS INTERNAL CNTEN ADS DATAIN ADDRESS CNTRST R W DATAOUT...

Page 17: ...n X X X X L Dout 0 Reset Counter Reset to Address 0 An X L X H Dout n Load Address Load into Counter X An H H H Dout n Hold External Address Blocked Counter Disabled X An H L H Dout n 1 Increment Coun...

Page 18: ...100 Pin Pb Free Thin Quad Flat Pack Industrial 128K x8 3 3V Synchronous Dual Port SRAM Speed ns Ordering Code Package Name Package Type Operating Range 6 5 1 CY7C09099V 6AC A100 100 Pin Thin Quad Flat...

Page 19: ...l 128K x9 3 3V Synchronous Dual Port SRAM Speed ns Ordering Code Package Name Package Type Operating Range 6 5 1 CY7C09199V 6AC A100 100 Pin Thin Quad Flat Pack Commercial CY7C09199V 6AXC A100 100 Pin...

Page 20: ...CY7C09079V 89V 99V CY7C09179V 89V 99V Document 38 06043 Rev C Page 20 of 21 Package Diagram Figure 18 100 Pin Thin Plastic Quad Flat Pack TQFP A100 51 85048 51 85048 B Feedback...

Page 21: ...INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE Cypress reserves the right to make changes without further notice to the materials describe...

Reviews: