PXD20RM Datasheet, PDF (449/1628 Pages) Freescale Semiconductor, Inc – PXD20 Microcontroller

11.8.1.3 Features
The PDI supports the following:
• RGB565, RGB666, 8 bit monochrome format,YCbCr422 mode
• Max input frequency of 32 MHz in 8/16/18 normal mode input
• Max input frequency of 64 MHz in 8 bit muxed (narrow) mode
• External Synchronization using PDI_HSYNC, PDI_VSYNC, and PDI_CLK
• External Synchronization using PDI_HSYNC, PDI_VSYNC, PDI_PCLK, and PDI_DE
• Internal synchronization using PDI[17:0] and PDI_PCLK. It is supported for RGB565 and
YCbCr422 muxed mode only
Table 11-76. Supported RGB format and Sync Format
RGB Format
8-bit monochrome
RGB565
RGB666
RGB565 muxed (uses narrow mode)
YCbCr (uses narrow mode)
Sync Format
Internal Sync (Valid only for RGB565and YCbCr in narrow mode)
External Sync
External sync (with data En)
Data Input Bus
8 bit
16 bit
18 bit
8 bit
8 bit
Pin Used
Pclk
PDI_HSYNC, PDI_VSYNC, PDI_PCLK
PDI_HSYNC, PDI_VSYNC, PDI_PCLK,
PDI_DE
11.8.1.4 ITU-R BT.656 sync information extraction
According to ITU-R BT.656 recommendation, the incoming digital video will have a pdi_clk signal and 8
data bits. The data bits can contain both the video data and the timing reference signals (VSYNC and
HSYNC).
The timing signals are encoded at the start and end of each line by timing reference codes known as Start
of Active Video (SAV) and End of Active Video (EAV). The SAV and EAV codes are identified by their
preamble of three bytes (0xFF,0x00,0x00). Due to this, neither 0x00 or 0xFF can be used during the Active
Video Data. The preamble is followed by the XY status word which contains a Field Bit (F), a Vertical
blanking bit (V) and Horizontal blanking bit (H) and four protection bits for single bit error correction and
detection.
The H bit is set to 1 to denote an EAV — that is the end of a line, and the beginning of the horizontal
blanking period. The V bit is set to 1 to denote the beginning of the vertical blanking period. The F bit is
used for interlaced video to denote if the forthcoming line is odd or even.
Freescale Semiconductor
PXD20 Microcontroller Reference Manual, Rev. 1
Preliminary—Subject to Change Without Notice
11-115