Motorola MPC823e - Page 1057

Video Controller
MOTOROLA MPC823e REFERENCE MANUAL 19-23
VIDEO CONTROLLER
19
Table 19-1. Video RAM Array Loaded with NTSC Example
RAM
ENTRY
RAM WORD FIELD
LINE DESCRIPTION
Hx Vx Fx Bx VDS INT LCYC LP LST
0 00 00 11 00 01 0 3 1 0 Entry 0:LP=1—Beginning of loop.
LCYC=3—Loop entries 0-3 three times.
CNT=1—Hold this entry for one video clock.
1 11 00 11 00 01 0 243 0 0 Entry 1:CNT=243—Hold this entry for 243 video
clocks.
2 11 00 11 00 01 0 1440 0 0 Entry 2:CNT=1440—Hold this entry for 1440 video
clocks.
3 11 00 11 00 01 0 32 1 0 Entry 3:LP=1—End of loop.
CNT=32—Hold this entry for 32 video clocks.
4 0000000001 0 18 1 0
Lines 4-21, FIELD = 0, BLANK
is asserted
(vertical blanking)
5 1100000001 02430 0
6 11 00 00 00 01 0 1440 0 0
7 1100000001 0 32 1 0
8 0000000001 02401 0
Lines 22-261. ODD field active area, the horizontal
line is repeated 240 times
9 1100000001 02350 0
10 11 00 00 11 01 0 8 0 0
11 11 00 00 11 00 0 1440 0 0
12 11 00 00 00 01 0 32 1 0
13 00 00 00 00 01 0 4 1 0
Lines 262-265, FIELD = 0, BLANK
asserted
(vertical; blanking)
14 11 00 00 00 01 0 243 0 0
15 11 00 00 00 01 0 1440 0 0
16 11 00 00 00 01 0 32 1 0
17 00 00 11 00 01 0 19 1 0
Lines 266-284, FIELD = 1, BLANK asserted
(vertical; blanking)
18 11 00 11 00 01 0 243 0 0
19 11 00 11 00 01 0 1440 0 0
20 11 00 11 00 01 0 32 1 0
21 00 00 11 00 01 0 240 1 0
Lines 285-524. EVEN Field active area
22 11 00 11 00 01 0 235 0 0
23 11 00 11 11 01 0 8 0 0
24 11 00 11 11 00 0 1440 0 0
25 11 00 11 00 01 0 32 1 0
26 00 00 11 00 01 0 1 1 0
Line 525, FIELD = 1, BLANK is asserted
(vertical blanking)
27 11 00 11 00 01 0 243 0 0
28 11 00 11 00 01 0 1440 0 0
29 11 00 11 00 01 1 32 1 1
NOTE: HX = HR:HF and VX = VR:VF.