AMD Geode™ SC2200 Processor Data Book 407
Electrical Specifications 32580B
Table 9-27. IDE Multiword DMA Data Transfer Timing Parameters
Symbol Parameter
Mode
Unit Comments012
t0Cycle time (min) 480 150 120 ns Note 1
tDIDE_IOR[0:1]#/IDE_IOW[0:1]# (min) 215 80 70 ns
tEIDE_IOR[0:1]# data access (max) 150 60 50 ns
tFIDE_IOR[0:1]# data hold (min) 5 5 5 ns
tGIDE_IOW[0:1]#/IDE_IOW[0:1]# data setup
(min)
100 30 20 ns
tHIDE_IOW[0:1]# data hold (min) 20 15 10 ns
tIIDE_DACK[0:1]# to IDE_IOR[0:1]#/
IDE_IOW[0:1]# setup (min)
000ns
tJIDE_IOR[0:1]#/IDE_IOW[0:1]# to
IDE_DACK[0:1]# hold (min)
20 5 5 ns
tKR IDE_IOR[0:1]# negated pulse width (min) 50 50 25 ns
tKW IDE_IOW[0:1]# negated pulse width (min) 215 50 25 ns
tLR IDE_IOR[0:1]# to IDE_DREQ[0:1] delay
(max)
120 40 35 ns
tLW IDE_IOW[0:1]# to IDE_DREQ0,1 delay
(max)
40 40 35 ns
tMIDE_CS[0:1]# valid to IDE_IOR[0:1]#/
IDE_IOW[0:1]# (min)
50 30 25 ns
tNIDE_CS[0:1]# hold 15 10 10 ns
tZIDE_DACK[0:1]# to TRI-STATE 20 25 25 ns
Note 1. t0 is the minimum total cycle time, tD is the minimum command active time, and tKR or tKW is the minimum command
recovery time or command inactive time. The actual cycle time equals the sum of the command active time and the
command inactive time. The three timing requirements of t0, tD and tKR/KW, are met. The minimum total cycle time
requirement t0 is greater than the sum of tD and tKR/KW. (This means that a host implementation can lengthen tD
and/or tKR/KW to ensure that t0 is equal to or greater than the value reported in the device’s IDENTIFY DEVICE
data.)