mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 1048

• Manufacturer Part Number: mpc823rg
• Description: Mpc823 Powerquicc Integrated Communications Processor For Portable Systems
• Manufacturer: Freescale Semiconductor, Inc

Video Controller
19.5.1 NTSC Example
The NTSC (National Television Standards Committee) broadcast method defines a virtual
screen of 525 lines, in which each line is 858 pixels long, but you can only see 485 of them.
Each horizontal line contains 720 pixels during the active line period and the rest of the line’s
pixels are presented during the digital blanking. Figure 19-5 illustrates how the frame is
divided into the following seven sections that correlate with the behavior of the FIELD and
BLANK signals:
• Lines 1-3: frame 1 retrace blanking
• Lines 4-21: frame 0 blanking
• Lines 22-261: frame 0 active video for odd lines
• Lines 262-265: frame 0 retrace blanking
• Lines 266-284: frame 1 blanking
• Lines 285-524: frame 1 active video for even lines
• Line 525: frame 1 retrace blanking
LINE BLANK FIELD
261
262
265
266
284
285
524
525
21
22
1
3
4
0/1
0/1
0/1
0/1
0
0
0
0
0
0
0
0
0
1
1
0
0
0
0
0
0
1
1
1
1
1
Freescale Semiconductor, Inc.
For More Information On This Product,
Figure 19-5. Interlaced NTSC Format
A B
A B
MPC823 REFERENCE MANUAL
Go to: www.freescale.com
C
C
RETRACE BLANKING
RETRACE BLANKING
RETRACE BLANKING
FRAM BUFFER A
FRAME BUFFER B
EVEN FIELD
ACTIVE VIDEO
ACTIVE VIDEO
ODD FIELD
BLANKING
BLANKING
D
D
E
E
FIELD 0
FIELD 1
FIELD 1
MOTOROLA