Chip Errata for the i.MX23 - Guy Carpenter

2752
2752 PXP YBASE Calculation Incomplete
Description:
Chapter 17, “Pixel Pipeline,” in the i.MX23 Applications Processor Reference Manual
(order # IMX23RM), states the following: “The [crop] XBASE and YBASE provide the
coordinates of the first block to be displayed from the source image and the WIDTH and HEIGHT
parameters specify an effective size of the resulting image in the output buffer.”
This statement is correct for non-interlaced, and interlaced_output. However, when doing
interlacing input to one field, the crop_ybase value gets shifted by 2 to match the size of the new
image. This results in an incorrect index into the original S0 image.
Workaround:
To get the correct location for cropping while doing interlaced input, the value of the crop_ybase
register needs to be doubled to get the desired index location into the S0 image.
Chip Errata for the i.MX23, Rev. 2
10 Freescale Semiconductor