SC3200 datasheet(401/447 Pages) AMD

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AMD Geode™ SC3200 Processor Data Book

401

Electrical Specifications

Revision 5.1

Table 9-24. IDE Register Transfer to/from Device Timing Parameters

Symbol

Parameter

Mode

Unit

Comments

01235

Cycle time (min)

600

383

240

180

120

Note 1

Address valid to IDE_IOR[0:1]#/

IDE_IOW[0:1]# setup (min)

IDE_IOR[0:1]#/IDE_IOW[0:1]# pulse

width 8-bit (min)

290

Note 1

t2i

IDE_IOR[0:1]#/IDE_IOW[0:1]#

recovery time (min)

Note 1

IDE_IOW[0:1]# data setup (min)

6045303020

IDE_IOW[0:1]# data hold (min)

IDE_IOR[0:1]# data setup (min)

5035202020

IDE_IOR[0:1]# data hold (min)

55555

t6Z

IDE_IOR[0:1]# data TRI-STATE

(max)

Note 2

IDE_IOR[0:1]#/IDE_IOW[0:1]# to

address valid hold (min)

tRD

Read data valid to IDE_IORDY[0:1]

active (if IDE_IORDY[0:1] initially low

after tA (min)

00000

IDE_IORDY[0:1] setup time

Note 3

IDE_IORDY[0:1] pulse width (max)

1250

IDE_IORDY[0:1] assertion to release

(max)

55555

Note 1. t0 is the minimum total cycle time, t2 is the minimum command active time, and t2i is the minimum command recov-

ery time or command inactive time. The actual cycle time equals the sum of the command active time and the com-

mand inactive time. The three timing requirements of t0, t2, and t2i are met. The minimum total cycle time

requirements is greater than the sum of t2 and t2i. (This means that a host implementation can lengthen t2 and/or

t2i to ensure that t0 is equal to or greater than the value reported in the device’s IDENTIFY DEVICE data.)

Note 2. This parameter specifies the time from the rising edge of IDE_IOR[0:1]# to the time that the data bus is no longer

driven by the device (TRI-STATE).

Note 3. The delay from the activation of IDE_IOR[0:1]# or IDE_IOW[0:1]# until the state of IDE_IORDY[0,1] is first sampled.

If IDE_IORDY[0:1] is inactive, then the host waits until IDE_IORDY[0:1] is active before the PIO cycle is completed.

If the device is not driving IDE_IORDY[0:1] negated after activation (tA) of IDE_IOR[0:1]# or IDE_IOW[0:1]#, then

t5 is met and tRD is not applicable. If the device is driving IDE_IORDY[0:1] negated after activation (tA) of

IDE_IOR[0:1]# or IDE_IOW[0:1]#, then tRD is met and t5 is not applicable.

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