82802AB Datasheet, PDF (48/53 Pages) Intel Corporation – Firmware Hub (FWH)

Intel^® 82802AB/AC Firmware Hub
R
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
Read
Output Disable
Read Identifier Codes
Write
Notes
1,2,6
6
3,6
4,5,6
RST#
VIH
VIH
VIH
VIH
OE#
V_IL
V_IH
V_IL
V_IH
WE#
V_IH
V_IH
V_IH
V_IL
Address
X
X
Note 3
X
VPP DQ[0:7]
X
D_OUT
X High Z
X Note 3
X
D_IN
Note:
1. When VPP ≤ VPPLK, the memory contents can be read, but not altered.
2. X can be V_IL or V_IH 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. V_IH and V_IL refer to the DC Characteristics associated flash memory output buffers:
V_IL min = -0.5V, V_IL max = 0.8V and V_IH min = 2.0V, V_IH max = V_CC + 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.
48
Datasheet