AMD P R E L I M I N A R Y
140 Am79C930
MEMORY BUS WRITE ACCESS
Parameter
Symbol Parameter Description Test Conditions Min Max Unit
tmAD MA[16:0] valid from CLKIN ↓ 2 100 ns
tmCD CE active delay from CLKIN ↓ Note 1 2 100 ns
tmWD MWE active delay from CLKIN ↓2 100 ns
tmCQ MD[7:0] driven from CLKIN ↓2ns
tmCV MD[7:0] valid from CLKIN ↓ 100 ns
tmAS Address Setup Time to MWE ↓TCLKIN-20 ns
tmAW Address Write Access Time 0 wait states 160 ns
(Note 3) 1 wait state 260 ns
2 wait states 360 ns
tmCW CE Write Access Time 0 wait states 160 ns
(Notes 1, 3) 1 wait state 260 ns
2 wait states 360 ns
tmWP MWE Write Access Time 0 wait states 150 ns
(Note 3) 1 wait state 250 ns
2 wait states 350 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 130 ns
1 wait state 230 ns
2 wait states 330 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 = 20 MHz.