SAA7124 Просмотр технического описания (PDF) - Philips Electronics
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SAA7124 Datasheet PDF : 44 Pages
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Philips Semiconductors
Digital Video Encoder (ECO-DENC)
Preliminary specification
SAA7124; SAA7125
SYMBOL
RCV2
RTCI
VDDD5
VSSD5
n.c.
VDDD6
VSSD6
n.c.
XTALI
XTALO
VDDDO
n.c.
LLC
VDDD7
CDIR
VSSD7
VrefL1
VrefH1
VDDA1
BLUE
res
VDDA2
GREEN
res
VDDA3
RED
res
CUR1
VDDA4
res
n.c.
TYPE
I/O
I
I
I
−
I
I
−
I
O
I
−
I/O
I
I
I
I
I
I
O
I
I
O
I
I
O
I
I
I
I
−
PIN
PLCC84 LQFP64 QFP80
DESCRIPTION
36
20
26 Raster Control 2 for video port. This pin provides an HS pulse
of programmable length or receives an HS pulse.
37
21
27 Real Time Control input. If the LLC clock is provided by an
SAA7111 or SAA7151B, RTCI should be connected to the
RTCO pin of the respective decoder to improve the signal
quality.
38
24
30 digital supply voltage 5
39
25
31 digital ground 5
40
−
35 not connected
41
30
37 digital supply voltage 6
42
51
39 digital ground 6
43
−
40 not connected
44
26
32 Crystal oscillator input (from crystal). If the oscillator is not
used, this pin should be connected to ground.
45
27
33 Crystal oscillator output (to crystal).
46
28
34 digital supply voltage for the internal oscillator; note 1
47
−
− not connected
48
29
36 Line-Locked Clock. This is the 27 MHz master clock for the
encoder. The I/O direction is set by the CDIR pin.
49
52
68 digital supply voltage 7
50
31
38 Clock direction. If CDIR input is HIGH, the circuit receives a
clock signal, otherwise if CDIR is LOW, LLC is generated by
the internal crystal oscillator.
51
53
67 digital ground 7
52
32
41 Lower reference voltage 1 input for DACs; connect to analog
ground.
53
33
42 Upper reference voltage 1 input for DACs; connect via 100 nF
capacitor to analog ground.
54
34
43 Analog supply voltage 1 for DACs.
55
35
44 Analog output of the BLUE component.
56
−
45 reserved
57
36
46 Analog supply voltage 2 for DACs.
58
37
47 Analog output of GREEN component.
59
−
48 reserved
60
38
49 Analog supply voltage 3 for DACs.
61
39
50 Analog output of RED component.
62
−
51 reserved
63
40
52 Current input 1 for RGB amplifiers; connect via 15 kΩ resistor
to VDDA.
64
41
53 Analog supply voltage 4 for DACs.
65
−
54 reserved
66
−
− not connected
1996 Nov 07
8
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