Table 6.36

64 Kbyte ROM Write Cycle

 

 

 

 

 

 

 

 

Symbol

Parameter

Min

Max

Unit

 

 

 

 

 

t11

Address setup to MAS/ HIGH

25

ns

t12

Address hold from MAS/ HIGH

15

ns

t13

MAS/ pulse width

25

ns

t20

Data setup to MWE/ LOW

30

ns

t21

Data hold from MWE/ HIGH

20

ns

t22

MWE/ pulse width

100

ns

t23

Address setup to MWE/ LOW

60

ns

t24

MCE/ LOW to MWE/ HIGH

120

ns

t25

MCE/ LOW to MWE/ LOW

25

ns

t26

MWE/ HIGH to MCE/ HIGH

25

ns

Figure 6.32 64 Kbyte ROM Write Cycle

CLK

MAD (Driven by LSI53C875A)

MAS1/ (Driven by LSI53C875A)

MAS0/ (Driven by LSI53C875A)

MCE/ (Driven by LSI53C875A)

MOE/ (Driven by LSI53C875A)

MWE/

(Driven by LSI53C875A)

Higher

Lower

Valid Write Data

Address

Address

 

t12

 

 

t11

 

 

t13

 

 

 

 

t24

 

t25

t26

 

 

 

t

t21

 

20

 

 

t23

t22

PCI and External Memory Interface Timing Diagrams

6-51

Page 289
Image 289
LSI 53C875A technical manual 32 ≤ 64 Kbyte ROM Write Cycle