Network Router User Manual

TMS380C26
NETWORK COMMPROCESSOR
SPWS010A–APRIL 1992–REVISED MARCH 1993
POST OFFICE BOX 1443 • HOUSTON, TEXAS
77251–1443
81
PARAMETER MEASUREMENT INFORMATION
68xxx mode bus arbitration timing, SIF takes control
NO. PARAMETER MIN MAX UNIT
208a
Setup of asynchronous input SBGR before SBCLK no longer high to guarantee recognition on
this cycle
15 ns
208b Hold of asynchronous input SBGR after SBCLK low to guarantee recognition on this cycle 15 ns
212 Delay from SBCLK low to address valid 25 ns
224a Delay from SBCLK low in cycle I2 to SOWN low (see Note 24) 25 ns
224c Delay from SBCLK low in cycle I2 to SDDIR low in DMA read 30 ns
230 Delay from SBCLK high to either SHRQ low or SBRQ high 25 ns
241 Delay from SBCLK high in TX cycle to SUDS and SLDS high 25 ns
241a
†
Hold of SUDS, SLDS, SRNW, and SAS high-impedance after SOWN low, bus acquisition t
c(SCK)–15
ns
†
This specification has been characterized to meet stated value.
NOTE 24: Motorola-style bus slaves hold SDTACK
active until the bus master deasserts SAS.