Sharp 64LHP5000 Service Manual page 74

64LHP5000
PROJECTOR UNIT
Ë SAA4952WP (SUB VIDEO ASSY: IC4704)
MEMORY CONTROLLER
» Pin Assignment
6 5 4 3
IE1 7
WE1 8
STROBE 9
V 10
DD2
HRA/BLNA 11
SAA4952WP
V 12
SS1
LLA 13
IE2 14
WE2 15
CLV 16
HVCD 17
18 19 20 21
» Pin Function
Pin No. Pin Name
1 HRD
2 VDD 1
3 SWC1
4 SRC
5 SDP
6 SWC05
7 IE1
8 WE1
9 STROBE
10 VCC 2
11 HRA/BLNA
12 VSS 1
13 LLA
14 IE2
15 WE2
16 CLV
17 HVCD
18 RE1
2 1 44 43 42 41 40
39
VACQ
38 VDFL
37
HDFL
36 V
DD4
35 HRDFL
34 V
SS3
33 LLDFL
32
P7
P6
31
30 P5
29 P4
24 25 26
22 23 27 28
I/O
Horizontal reference signal output (display PLL)
O
Supply voltage 1
—
Serial write clock output for memory 1
O
Serial read clock output
O
Select deflection processor input
I
Serial write clock output,SWC1 divided-by-2
O
Input enable signal output (memory 1)
O
Write enable signal output (memory 1)
O
Strobe signal input
I
Supply voltage 2
—
Horizontal reference signal output (acquisition part)/horizontal blanking signal input,reset for
I/O
horizontal acquisition counters(acquisition part)
Ground 1
—
Line- locked cloack signal input (acquisition part)
I
Input enable signal output (memory 2)
O
Write enable signal output (memory 2)
O
Horizontal signal output (acquisition part)
O
Horizontal,vertical or composite blanking signal output (display part)
O
Read enable signal output (memory 1)
O
» Block Diagram
ALE WRD P0
21 22
25
MICROCONTROLLER INTERFACE
STROBE 9
LLA
13
(12,13.5,16,18MHz)
TEST
40
SDP 5
SSC 41
VACQ
39
(50/60Hz)
DEFLECTION
LLDFL
33
(27,32,36MHz) TIMING
LLD
43
(32,36MHz)
LOGIC
Function
74
P1 P2 P3 P4 P5 P6 P7
26 28
27 29 30 31 32
SAA4952WP
IE
PROCESSING
+2
ACQUISITION
HWE1
HORIZONTAL
TIMING
VACQS
LOGIC
ACQUISITION
VWE1
VERTICAL
TIMING
DISPLAY VWE2
VERTICAL
VRE1
TIMING
VRE2
VD
LOGIC
HWE2
HRE
DISPLAY HD
HORIZONTAL
TIMING
2 10 23 36 12 24 34 44
V 1 to V 4 V 1 to V 4
DD DD SS SS
7 IE1
IE2
14
3 SWC1
6 SWC05
11 HRA/BLNA
16
CLV
8
WE1
42 RSTW1
35 HRDFL
37 HDFL
38 VDFL
15 WE2
17 HVCD
18 RE1
19 RE2
20
BLND
1 HRD
4 SRC