For example, if you order ADV7341BSTZ encoder from Analog Devices and receive the chip below.
Analog devices explains what that means:
The latest revision of the encoder has the -3 version branded on it’s package. The revision code of the encoder can be read back from register 0xBB bits 7:6. 01B indicates the latest revision.
Further information on the change made to this version is described in the section HD interlace External HS and VS considerations of the datasheets.
This applies to the following series of parts:
ADV7340
ADV7341
ADV7342
ADV7343
For your convenience here is the HD interlace External HS and VS considerations from the datasheet.
HD INTERLACE EXTERNAL P_HSYNC AND
P_VSYNC CONSIDERATIONS
If the encoder revision code (Subaddress 0xBB, Bits[7:6]) = 01
or higher, the user should set Subaddress 0x02, Bit 1 to high to
ensure exactly correct timing in HD interlace modes when
using the P_HSYNC and P_VSYNC synchronization signals. If
this bit is set to low, the first active pixel on each line is masked.
Also, Pr and Pb outputs are swapped when using the YCrCb
4:2:2 input format. Setting Subaddress 0x02, Bit 1 to low causes
the encoder to behave in the same way as the first version of
silicon (that is, this setting is backward compatible).
If the encoder revision code (Subaddress 0xBB, Bits[7:6]) = 00,
the setting of Subaddress 0x02, Bit 1 has no effect. In this
version of the encoder, the first active pixel is masked. Also, Pr
and Pb outputs are swapped when using the YCrCb 4:2:2 input
format. To avoid these limitations, use the newer revision of
silicon or use a different type of synchronization.
These considerations apply only to the HD interlace modes
with external P_HSYNC and P_VSYNC synchronization
(EAV/SAV mode is not affected and always has exactly correct
timing). There is no negative effect in setting Subaddress 0x02,
Bit 0 to high, and this bit can remain high for all the other video
standards.
Applicable Part Numbers
| DigiKey Part Number | Manufacturer Part Number |
|---|---|
| 505-ADV7341BSTZ-ND | ADV7341BSTZ |
| 505-ADV7343BSTZ-ND | ADV7343BSTZ |
| 505-ADV7343WBSTZ-ND | ADV7343WBSTZ |
| ADV7343WBSTZ-RL-ND | ADV7343WBSTZ-RL |
| ADV7340BSTZ-ND | ADV7340BSTZ |
| ADV7342BSTZ-ND | ADV7342BSTZ |