GS9000D Просмотр технического описания (PDF) - Gennum -> Semtech
Номер в каталоге
Компоненты Описание
производитель
GS9000D Datasheet PDF : 9 Pages
| |||
+5V
22µ
3 x 100n
SDIIN
SDIIN
SCIIN
SCIIN
STANDARDS SELECT BIT 1
STANDARDS SELECT BIT 0
+5V
100k
820p
**
12 13 18
1
VDD VDD VDD HSYNC 17
PD0
DECODER
5 SDI GS9000D
6 SDI
7 SCI
8 SCI
9 SS1
10 SS0
11 SSC
PDI 19
PD2 20
PD3 21
PD4 22
PD5 23
PD6 24
PD7 25
PD8 27
PD9 28
PCLK 16
SCE 14
VSS VSS VSS SWC SWF
2 4 26 15 3
** Locate the three 0.10µF decoupling
capacitors as close as possible to the
corresponding pins on the GS9000D.
Chip capacitors are recommended.
HSYNC OUTPUT
PARALLEL DATA BIT 0
PARALLEL DATA BIT 1
PARALLEL DATA BIT 2
PARALLEL DATA BIT 3
PARALLEL DATA BIT 4
PARALLEL DATA BIT 5
PARALLEL DATA BIT 6
PARALLEL DATA BIT 7
PARALLEL DATA BIT 8
PARALLEL DATA BIT 9
PARALLEL CLOCK OUT
SYNC CORRECTION ENABLE
10p
13 x 425
SYNC WARNING FLAG
39k
+5V
Fig. 8 GS9000D Test Set-Up
All resistors in ohms,
all capacitors in farads,
unless otherwise specified.
With synchronized serial data and clock connected to the
GS9000D, the HSYNC output (pin 1) will toggle for each
HSYNC detected. The Parallel Data bits PD0 through PD9
and the Parallel Clock can be observed on an oscilloscope
or fed to a logic analyzer. To directly drive parallel inputs to
receiving equipment, such as monitors or digital to analog
converters, these outputs can be fed through a suitable TTL
to ECL converter.
In operation, the HSYNC output from the GS9000D decoder
toggles on each occurrence of the timing reference signal
(TRS). The state of the HSYNC output is not significant, but
the time at which it toggles is significant.
The HSYNC output toggles to indicate the presence of the
TRS on the falling edge of PCLK, one data symbol prior to
the output of the first word in the TRS. In the following
diagram, data is indicated in 10-bit Hex.
PCLK
PDN
XXX 3FF 000 000 XXX
XXX 3FF 000 000 XXX
HSYNC
Fig. 10 Operation of HSYNC with Respect to PCLK
4ƒSC
DATA
STREAM
HSYNC
OUT
T ACTIVE VIDEO T ACTIVE VIDEO T
R
S
& H BLANKING
R
S
& H BLANKING
R
S
4:2:2
DATA
STREAM
HSYNC
OUT
EH
S
A BLNK A
V
V
ACTIVE
VIDEO
EH
S
A BLNK A
V
V
Fig. 9 Operation of HSYNC Output
GENNUM CORPORATION
7 of 9
18784 - 3
Share Link: 