82802AB datasheet(48/53 Pages) INTEL

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Intel

® 82802AB/AC Firmware Hub

Datasheet

6.2.4.

Read Identifier Codes Operation

The read identifier codes operation outputs the manufacturer and device codes (see Table 4). Using the

manufacturer and device codes, automated test equipment (ATE) or PROM programmer software can

confirm the proper device ID.

6.2.5.

Write Operation

The CUI does not occupy a specific addressable memory location. It is written to when WE# is active

and OE# = VIH. The address previously captured by R/C# transitions and the data needed to execute a

command are latched on the WE# rising edge.

Table 21.

Bus Operations

Mode

Notes

RST#

OE#

WE#

Address

VPP

DQ[0:7]

Read

1,2,6

VIH

VIL

VIH

DOUT

Output Disable

VIH

High Z

Read Identifier Codes

3,6

VIH

VIL

VIH

Note 3

Write

4,5,6

VIH

VIL

DIN

Note:

When VPP

≤ VPPLK, the memory contents can be read, but not altered.

2. X can be V

IL or VIH for the control and address input pins and VPPLK or VPPH1/2 for the VPP supply

pin. See the DC characteristics for the VPPLK and VPPH1/2 voltages.

3. See Table 4 for the read identifier code data and addresses.

4. Command writes involving block erase or program are reliably executed when VPP = VPPH1/2 and

VCC = VCC ± 0.3 V.

5. Refer to Table 2 for the valid DIN during a write operation.

6. VIH and VIL refer to the DC Characteristics associated flash memory output buffers:

VIL min = -0.5V, VIL max = 0.8V and VIH min = 2.0V, VIH max = VCC + 0.5V.

6.3.

Command Definitions

Flash core programming commands in A/A Mux mode are identical to commands for the FWH mode.

Refer to Section 4 of this document.

6.4.

Electrical Characteristics in A/A Mux Mode

Certain specifications differ from the previous sections, when programming in the A/A Mux mode. The

following subsections provide this data. Any information not provided here is not specific to the A/A

Mux mode. Refer to Section 5 of this document and use the Intel FWH mode specifications.

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