Network Router User Manual

TMS380C26
NETWORK COMMPROCESSOR
SPWS010A–APRIL 1992–REVISED MARCH 1993
POST OFFICE BOX 1443 • HOUSTON, TEXAS
77251–1443
49
PARAMETER MEASUREMENT INFORMATION
memory bus timing: external bus master read from TMS380C26
t
M
is the cycle time of one-eighth of a local memory cycle (31.25 ns minimum)
NO. PARAMETER MIN MAX UNIT
84 Setup time of address on MAX0 and MAX2 before MBCLK1 falling edge, external bus master access 21 ns
85 Hold time of address on MAX0 and MAX2 after MBCLK1 low, external bus master access 0 ns
86 Setup time of valid address before MBCLK1 falling edge, external bus master access 21 ns
87 Hold time of valid address after MBCLK1 low, external bus master access 0 ns
88 Setup time of address high impedance before MBCLK1 falling edge, external bus master read 0 ns
89 Setup time of data/parity valid before MBCLK2 falling edge, external bus master read 1.5t
M
– 17
†
ns
90 Hold time of valid data/parity after MBCLK2 low, external bus master read t
M
– 13 ns
91 Setup time of data/parity high impedance before MBCLK2 rising edge, external bus master read t
M
– 9 ns
92 Setup time of MDDIR low before MBCLK2 falling edge, external bus master read 21 ns
93 Hold time of MDDIR low after MBCLK2 low, external bus master read 0 ns
94 Setup time of MACS low before MBCLK2 falling edge, external bus master read 21 ns
95 Hold time of MACS low after MBCLK2 low, external bus master read 0 ns
†
This specification has been characterized to meet stated value.