AMD Am79C930 manual 140

AMDP R E L I M I N A R Y

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 ↓		2		ns
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.

140 Am79C930