Toshiba SR-C8002 - Manual (Page 20)

15/24 SR-C8002 Rev.1.0
6.2.3.Timing of Host Interface (DMA Multi)
Figure 10 shows the Host Interface DMA multi word Timings
DMARQ
DMACK-*1
DIOR-/DIOW-*1
Read
DD0-15
Write
DD0-15
tZ
tI
tJ
tD
tE
tL
tF
tH tG
t0
tK
*1: In all timing diagrams, the low line indicator negated, and the upper line
indicators asserted.
Multi word DMA
timing parameters min(ns) max(ns)
Min time (ns) Max time (ns)
t0 Cycle time 120
tC DMACK to DMREQ delay ---
tD DIOR-/DIOW-16-bit 70
tE DIOR- data access ---
tF DIOR- data hold 5
tZ DMACK- to tristate 25
tG DIOR/DIOW- data setup 20
tH DIOW- data hold 10
tI DMACK to DIOR-/DIOW- setup 0
tJ DIOR-/DIOW- to DMACK hold 5
tKr DIOR- negated pulse width 25
tKw DIOW- negated pulse width 25
tLr DIOR- to DMREQ delay 35
tLw DIOR- to DMREQ delay 35
Figure 10 Host Interface Timing (Multi Word DMA Mode 2)