STV9410 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'STV9410' PDF : 25 Pages View PDF
STV9410
2.3 CLOCK AND TIMING GENERATOR
The whole timing is derived from XTI input fre-
quency which can be an external generator or a
crystal signal thanks to XTO/XTI oscillator.This
clock is also pixel frequency which can be chosen
between 8MHz to 10MHz (pxlck). This clock is
available on CKO pin. It should be use for the MCU,
saving a crystal in the application.
The active area of a video line is 320 pixels periods
long (40 characters of 8 pixels wide). Number of
lines per frame, margin width, line duration, leading
and trailing edges of horizontal synchronizationare
fully programmable in CRT mode using VERT,
HORI, HSYN registers.
A RESET, can be applied to STV9410 by pulling
low VREF pin ( ≤ 0.4V).
On RESET, default values are forced into configu-
ration registers and video outputs are at low level.
All unused bit of registers are always read as ”0”.
Figure 6 : Vert Register Scan Lines Programmation
2.3.1 Time Base Registers
Vertical Time Base and Configuration
Register (VERT)
Internal address : 2FF1-2FF0 h
RESET value :01-36 h
(@ = RESET default configuration)
2FF1 h LCD ILC C/H V/P VSE HSE - F8
@ 00000001
2FF0 h F7 F6 F5 F4 F3 F2 F1 F0
@ 00110110
LCD : 1 LCD mode
0 CRT mode @
ILC : 1 Interlaced scanning
0 non-interlaced scanning @
C/H : 1 CSYNC is composite synchro
0 CSYNC is horizontal synchro @
V/P
VSE
: 1 VSYNC is vertical synchro
0 VSYNC is RTP bit of current descriptor @
: 1 enable vertical synchro with SYNC IN
0 disable @
HSE : 1 enable horizontal synchro with SYNC IN
0 disable @
F (8:0) : scan line number per frame (@ 312)
2FF1
LCD ILC C/H V/P VSE HSE -
XXXXXX -
2FF0
F8 F7 F6 F5 F4 F3 F2 F1 F0
000000000
000000001
000001110
000111110
001100010
001110110
011101110
011111000
100000100
100000101
100110100
100110110
100110111
100111110
111011110
111111110
111111111
F[8:0] = Scan Line Number - 2
Nb of S can LS B
Lines
HEXA
F(0:8) + 2
Not allowed
-
3
01
16
0E
64
3E
100
62
120
76
240
EE
250
F8
262
04
263
05
310
34
312
36
313
37
320
3E
480
DE
512
FE
513
FF
11/25
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