Network Router User Manual

TMS380C26
NETWORK COMMPROCESSOR
SPWS010A–APRIL 1992–REVISED MARCH 1993
POST OFFICE BOX 1443 • HOUSTON, TEXAS
77251–1443
67
PARAMETER MEASUREMENT INFORMATION
80x8x mode bus arbitration timing, SIF takes control
NO. PARAMETER MIN MAX UNIT
208a
Setup of asynchronous signal SBBSY and SHLDA before SBCLK no longer high to guarantee
recognition on that cycle
15 ns
208b
Hold of asynchronous signal SBBSY and SHLDA after SBCLK low to guarantee recognition on
that cycle
15 ns
212 Delay from SBCLK low to SADH0–SADH7, SADL0–SADL7, SPH, and SPL valid 25 ns
224a Delay from SBCLK low in cycle I2 to SOWN low 25 ns
224c Delay from SBCLK low in cycle I2 to SDDIR low in DMA read 30 ns
230 Delay from SBCLK high to SHRQ high 25 ns
241 Delay from SBCLK high in TX cycle to SRD and SWR high, bus acquisition 25 ns
241a
†
Hold of SRD and SWR high-impedance after SOWN low, bus acquisition t
c(SCK)–15
ns
†
This specification has been characterized to meet stated value.