Texas Instruments TMS380C26 - Manual (Page 42)

TMS380C26
NETWORK COMMPROCESSOR
SPWS010A–APRIL 1992–REVISED MARCH 1993
POST OFFICE BOX 1443
•
HOUSTON, TEXAS
77251–1443
42
PARAMETER MEASUREMENT INFORMATION
memory bus timing: write cycle
t
M
is the cycle time of one-eighth of a local memory cycle (31.25 ns minimum)
NO. PARAMETER MIN MAX UNIT
58 Setup time of MW low before MRAS no longer low 1.5tM – 9 ns
60 Setup time of MW low before MCAS no longer low 1.5tM – 6.5 ns
63 Setup time of valid data/parity before MW no longer high 0.5tM –11.5 ns
64 Pulse duration of MW low 2.5tM – 9 ns
65 Hold time of data/parity out valid after MW high 0.5tM – 10.5 ns
66 Setup time of address valid on MAX0, MAX2, and MROMEN before MW no longer low 7tM –11.5 ns
67 Hold time from MRAS low to MW no longer low 5.5tM – 9 ns
69 Hold time from MCAS low to MW no longer low 4tM –11.5 ns
70 Setup time of MBEN low before MW no longer high 1.5tM – 13.5 ns
71 Hold time of MBEN low after MW high 0.5tM – 6.5 ns
72 Setup time of MDDIR high before MBEN no longer high 2tM – 9 ns
73 Hold time of MDDIR high after MBEN high 1.5tM – 12 ns