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PDF SAA5231 Data sheet ( Hoja de datos )
| Número de pieza | SAA5231 | |
| Descripción | Teletext video processor | |
| Fabricantes | Philips | |
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INTEGRATED CIRCUITS
DATA SHEET
SAA4990H
Progressive scan-Zoom and Noise
reduction IC (PROZONIC)
Preliminary specification
File under Integrated Circuits, IC02
1996 Oct 25
1 page  
Philips Semiconductors
Progressive scan-Zoom and Noise
reduction IC (PROZONIC)
Preliminary specification
SAA4990H
SYMBOL
HD
YUVD8
YUVD9
YUVD10
VDD5
VSS5
YUVD11
YUVD0
YUVD1
YUVD2
VDD6
VSS6
YUVD3
YUVD4
YUVD5
YUVD6
YUVD7
VDD7
VSS7
SNRST
SNDA
SNCL
AUX
HO
n.c.
n.c.
YUVA7
YUVA6
YUVA5
YUVA4
YUVA3
YUVA2
VSS8
VDD8
YUVA1
YUVA0
YUVA11
YUVA10
YUVA9
YUVA8
PIN TYPE
41 input
42 output
43 output
44 output
45 supply
46 ground
47 output
48 output
49 output
50 output
51 supply
52 ground
53 output
54 output
55 output
56 output
57 output
58 supply
59 ground
60 input
61 I/O
62 input
63 output
64 output
65 −
66 −
67 input
68 input
69 input
70 input
71 input
72 input
73 ground
74 supply
75 input
76 input
77 input
78 input
79 input
80 input
DESCRIPTION
horizontal reference signal
UV bit 0
UV bit 1
UV bit 2
supply voltage 5
ground 5
UV bit 3
Y bit 0
Y bit 1
Y bit 2
supply voltage 6
ground 6
Y bit 3
Y bit 4
Y bit 5
Y bit 6
Y bit 7
supply voltage 7
ground 7
field frequent reset from microcontroller; reset for SNERT interface
data for SNERT interface
clock for SNERT interface
spare output from line-sequencer
output hold to e.g. LC display
not connected
not connected
Y bit 7 from FM1
Y bit 6 from FM1
Y bit 5 from FM1
Y bit 4 from FM1
Y bit 3 from FM1
Y bit 2 from FM1
ground 8
supply voltage 8
Y bit 1 from FM1
Y bit 0 from FM1
UV bit 3 from FM1
UV bit 2 from FM1
UV bit 1 from FM1
UV bit 0 from FM1
1996 Oct 25
5
5 Page 
Philips Semiconductors
Progressive scan-Zoom and Noise
reduction IC (PROZONIC)
Preliminary specification
SAA4990H
handbook, halfpage hor_start_box
hor_stop_box
vert_start_box
,,,,,,,,,,,,,,,vert_stop_box
MGE033
RE2
Read enable for FM2, processed from RE by PROZONIC.
WE2
Write enable for FM2, processed from RE by PROZONIC.
HO
Holds the writing of the LC display when active.
AUX
Spare output from line-sequencer.
Fig.7 Box dimensions and position.
VD
Field frequent reset signal, used in PROZONIC to reset
line counting for boxing. The rising edge of VD is taken as
reference. This may be the display related vertical pulse.
Control and microcontroller (SNERT-) interface
CONTROL SIGNALS
CK
Line-locked clock of nominal 27 or 32 MHz. This is the
system clock, nominally 864 or 1024 × fh, where fh is the
line frequency. Within the PROZONIC, CK is distributed to
different blocks.
HD
Horizontal reference signal. This signal defines with its
rising edge the start phase of the UV 4 : 1 : 1 format. If the
HD signal has a period equal to 4 clock periods, the UV
data will remain in phase without disruptions, once it has
become in phase. For any mismatch between the applied
HD to the UV data phase, an appropriate HD delay can be
set in the PROZONIC. HD is also used to count lines for
boxing.
RE
Master read enable from memory controller or
ECOBENDIC. This signal controls the memory read
enable if only one field memory is present. To control two
field memories, the PROZONIC generates RE1, RE2 and
WE2 from RE. The vertical sample rate conversion
function has a major influence on these signals.
SNRST
Field frequent asynchronous reset signal, used in
PROZONIC to reset the communication with
microcontroller. After the rising edge of SNRST,
communication is in its defined state. SNRST is also used
to define the initial phase of the line-sequencer.
SNCL
microcontroller interface clock signal. This signal is
transferred asynchronous to CK by a microcontroller
(UART of 8051 family, mode 0) as communication clock
signal at a frequency of 1 MHz.
SNDA
microcontroller interface data signal. This signal is
transferred or received (asynchronous to CK) by a
microcontroller (UART of 8051 family, mode 0) as
communication data signal at 1 MBaud, related to SNCL.
EXTERNAL CONTROL
The PROZONIC is controlled via the microcontroller
(SNERT) interface, by sending an address byte and a data
byte to it, with the controllable items as in the register
descriptions in Tables 2 and 3.
RE1
Read enable for FM1, processed from RE by PROZONIC.
1996 Oct 25
11
11 Page | ||
| Páginas | Total 28 Páginas | |
| PDF Descargar | [ Datasheet SAA5231.PDF ] | |
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