AMD P R E L I M I N A R Y
138 Am79C930
MEMORY BUS WRITE ACCESS
Parameter
Symbol Parameter Description Test Conditions Min Max Unit
tmAD MA[16:0] valid from CLKIN ↓260ns
tmCD CE active delay from CLKIN ↓Note 1 2 60 ns
tmWD MWE active delay from CLKIN ↓260ns
tmCQ MD[16:0] driven from CLKIN ↓2ns
tmCV MD[16:0] valid from CLKIN ↓60 ns
tmAS Address Setup Time to MWE ↓TCLKIN-20 ns
tmAW Address Write Access Time 0 wait states 95 ns
(Note 3) 1 wait state 145 ns
2 wait states 195 ns
tmCW CE Write Access Time 0 wait states 95 ns
(Notes 1, 3) 1 wait state 145 ns
2 wait states 195 ns
tmWP MWE Write Access Time 0 wait states 90 ns
(Note 3) 1 wait state 140 ns
2 wait states 190 ns
tmWQ MWE ↓ to MD[7:0] driven –10 ns
tmAH MA[16:0] valid hold from MWE ↑TCLKIN-10 ns
tmCH CE valid hold from MWE ↑Note 1 TCLKIN-10 ns
tmWI CE Inactive Time Note 1, 2 0 ns
tmSW MD[7:0] valid setup to MWE ↑0 wait states 80 ns
1 wait state 130 ns
2 wait states 180 ns
tmHW MD[7:0] valid hold from MWE ↑Note 2 TCLKIN-15 ns
tmHWZ MD[7:0] inactive from MWE ↑Note 2 2 X TCLKIN-10 2 X TCLKIN+10 ns

Notes:

1.

CE

= one of:

FCE

,

SCE

,

XCE

2. Parameter not included in the production test.

3. Value is dependent upon TCLKIN value. Value given is for CLKIN = 40 MHz.