QG80331M500 datasheet(66/67 Pages) INTEL

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Specification Update

Intel® 80331 I/O Processor

Documentation Changes

10.

Power sequence timing

Problem:

Section 9.1 of the Intel® 80331 I/O Processor Design Guide describes the power sequence

requirement between VCC33 and VCC15, but does not mention any timing parameters.

Workaround:

The following are the power sequencing requirements that must be followed:

1. The 80331 requires that the VCC33 voltage rail be no less than 0.5 V below VCC15 (absolute

voltage value) at all times during operations, including during system power-up and

power-down. In other words, the following must always be true:

— VCC33 >= (VCC15 - 0.5 V). This can be accomplished by placing a diode (with a voltage

drop < 0.5 V) between VCC15 and VCC33. The Anode is connected to VCC15 and the

Cathode is connected to VCC33.

2. When a voltage regulator solution is used, which shunts VCC15 to ground while VCC33 is

powered, the maximum allowable time that VCC15 can be shunted to ground while VCC33 is

fully powered is 20 ms.

3. The maximum allowed time between VCC33 and VCC15 ramping is 525 ms. There is no

minimum sequencing time requirement.

Affected Docs: Intel® 80331 I/O Processor Design Guide

11.

Updated Peripheral Bus Interface (PBI) timings

Problem:

Table 27 in the 80331 datasheet must be updated.

Workaround:

Table 27 must have the following values:

• Tah1 – ALE high time = 15 ns minimum

• Tav1 – ALE high to address valid = 0 ns maximum

• Tah2 – ALE low to address invalid = 15 ns maximum

• Tas1 – Address valid to ALE low = 15 ns minimum

• Tao1 – ALE low to POE# low = 0 ns minimum

• Taw1 – ALE low to PWE# low = 15 ns minimum

• Tah3 – PWE# high to data invalid = 15 ns minimum

• Tas2 – Data valid to PWE# high = 6 0ns minimum

• Tac1 – ALE low to PCE[1:0]# low = 15 ns minimum

Affected Docs: Intel

® 80331 I/O Processor Datasheet

12.

ATU PM_CAP[5] text must be updated

Problem:

Table 140, bit[5] reads as follows: DSI – This field is set to 02 meaning that this function requires a

device specific initialization sequence following the transition to the D0 uninitialized state.

Workaround:

It must be changed to the following: DSI – This field is set to 02 meaning that this function does not

require a device specific initialization sequence following the transition to the D0 uninitialized

state.

Affected Docs: Intel® 80331 I/O Processor Developer’s Manual

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