Cypress CY7C140 Manual do Utilizador descarregar pdf (Página 10)

CY7C130, CY7C130A

CY7C131, CY7C131A

CY7C140, CY7C141

Document #: 38-06002 Rev. *E Page 10 of 19

Figure 8. Write Cycle No. 1 (OE Three-States Data I/Os—Either Port

[16, 23]

Figure 9. Write Cycle No. 2 (R/W Three-States Data I/Os—Either Port)

[17, 24]

Switching Waveforms

(continued)

DATA VALID

HIGH IMPEDANCE

SCE

PWE

R/W

ADDRESS

HZOE

OUT

DATA

Either Port

SCE

PWE

HZWE

HIGH IMPEDANCE

DATA VALID

LZWE

ADDRESS

R/W

DATA

OUT

DATA

Notes

23. If OE

is LOW during a R/W controlled write cycle, the write pulse width must be the larger of t

PWE

or t

HZWE

+ t

to allow the data I/O pins to enter high impedance

and for data to be placed on the bus for the required t

24. If the CE

LOW transition occurs simultaneously with or after the R/W LOW transition, the outputs remain in the high impedance state.

[+] Feedback

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 18 19

CY7C130, CY7C130A 10
CY7C131, CY7C131A 10
CY7C140, CY7C141 10

Comentários a estes Manuais

Sem comentários

Cypress CY7C140 Manual do Utilizador Página 10

Comentários a estes Manuais

Manuais e produtos relacionados com Hardware Cypress CY7C140