Video Controller
MOTOROLA MPC823e REFERENCE MANUAL 19-27
VIDEO CONTROLLER
19
Table 19-2. Video RAM Word Loaded with PAL Example
RAM
ENTRY
RAM WORD FIELD
LINE DESCRIPTION
Hx Vx Fx Bx VDS INT LCYC LP LST
0 00 00 00 00 01 0 22 1 0
Lines 1-22, FIELD = 0, BLANK is asserted (vertical
blanking)
1 11 00 00 00 01 0 263 0 0
2 11 00 00 00 01 0 1440 0 0
3 1100000001 0 24 1 0
4 00 00 00 00 01 0 288 1 0 Entry 4: Beginning of loop(loop entries 4-8 288
times). Assert HSYNC
and BLANK for 1 video clock.
5 11 00 00 00 01 0 255 0 0 Entry 5: Assert BLANK
and negate HSYNC for 255
video clocks.
6 11 00 00 11 01 0 8 0 0 Entry 6: Negate BLANK
for 8 video clocks. Display
video data from the VBCB.
7 11 00 00 11 00 0 1440 0 0 Entry 7: Display active video data from frame buffer
for 1440 video clocks (720 pixels).
8 11 00 00 00 01 0 24 1 0 Entry 8: Assert BLANK
for 24 video clocks.
9 0000000001 0 2 1 0
Lines 311-312, FIELD = 0, BLANK
asserted
(vertical; blanking)
10 11 00 00 00 01 0 263 0 0
11 11 00 00 00 01 0 1440 0 0
12 11 00 00 00 01 0 24 1 0
13 00 00 11 00 01 0 23 1 0
Lines 313-335, FIELD = 1, BLANK
asserted
(vertical; blanking)
14 11 00 11 00 01 0 263 0 0
15 11 00 11 00 01 0 1440 0 0
16 11 00 11 00 01 0 24 1 0
17 00 00 11 00 01 0 288 1 0
Lines 336-623. EVEN field active area
18 11 00 11 00 01 0 255 0 0
19 11 00 11 11 01 0 8 0 0
20 11 00 11 11 00 0 1440 0 0
21 11 00 11 00 01 0 24 1 0
22 00 00 11 00 01 0 2 1 0
Lines 624-625, FIELD = 1, BLANK
is asserted
(vertical blanking)
23 11 00 11 00 01 0 263 0 0
24 11 00 11 00 01 0 1440 0 0
25 11 00 11 00 01 1 24 1 1
NOTE: HX = HR:HF and VX = VR:VF.
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