VESA E-EDID Verification Guide Release A
Copyright 1994 - 2007 Video Electronics Standards Association Page 16 of 109
3.2.4 Test for a Valid Week and Year of Manufacture or Model Year: 2 Bytes
There are two definitions for this data field: Week & Year of Manufacture or Model Year.
The week of manufacture field is optional, but the year of manufacture (or model year) field is required
in EDID structure version 1, revision 4. The week of manufacture field (if used) is set to a value in the
range of 1-54 weeks. If the week of manufacture field is not used, the value shall be set to ‘00h’.
The year of manufacture field is used to represent the year of the display’s manufacture or the model
year. If the year of manufacture field is used to represent the model year, then set the week of
manufacture (at address 10h) to ‘FFh’. Then enter the model year (at address 11h). The value that is
stored is an offset from the year 1990 as derived from the following equation:
Stored Value = (Year of Manufacture {or Model Year} - 1990)
Table 3-10 contains the definition for the Week & Year of Manufacture or Model Year. The test for a
valid Week & Year of Manufacture or Model Year Code is shown in Table 3.11. For more information
on the Week & Year of Manufacture or Model Year refer to section 3.4.4 in the E-EDID Standard
Release A, Revision 2.
Table 3-4: Week & Year of Manufacture or Model Year Definition
Address 2 Bytes Value Description
00h Week of Manufacture is not specified
01h → 36h Week of Manufacture is specified (range is 1 → 54 weeks)
37h → FEh Reserved: Do not use
10h
1
FFh
Model Year Flag --- Model Year is specified at address 11h
00h → 0Fh Reserved: Do not use
10h → FFh
If Byte 10h = FFh then Byte 11h contains Model Year
11h
1
10h → FFh
If Byte 10h ≠ FFh then Byte 11h contains Year of
Manufacture
Pre-Test Requirements: The tester shall make note of the week (if used) and the year of manufacture or
the model year of the display (or sink device). The week and year of manufacture of the display (or sink
device) may be shown on a label located on the rear of the display product or located in a manufacturer’s
data base. The model year may be shown on a label located on the rear of the display product or located
in a manufacturer’s data base or listed in the manufacturer’s product specifications. The tester should
record the Week of Manufacture (or Model Year Flag) and the Year of Manufacture (or Model Year) in
the Verification Test Report Form. The tester converts the Week of Manufacture (or Model Year Flag)
and the Year of Manufacture (or Model Year) into the 2 byte code. Both the decimal numbers and the 2
byte codes for the Week of Manufacture (or Model Year Flag) and the Year of Manufacture (or Model
Year) should be recorded in the Verification Test Report Form.
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