Sharp LU850425 Datasheet
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1
DESCRIPTION
The LU850425 is a CMOS 8-bit single-chip
microcomputer for CCD digital camera systems
which include a CDS/AGC IC (IR3Y38M), a DSP
IC (LR38266), a timing generator IC (LR38578),
and this microcomputer IC.
FEATURES
• Auto exposure control (electronic exposure and
mechanical exposure)
• Auto carrier balance tuning
• Auto white balance control
• In combination with an external controller
(personal computer), functions below can be
controlled (see "Serial Control Interface" in
FUNCTIONAL DESCRIPTION)
q Switchable :
AGC/ON/OFF
Auto white balance/AUTO/PRESET
Aperture enhancement/ON/OFF
Back light compensation/ON/OFF
GAMMA correction/ON/OFF
w Electronic shutter speed selection :
Auto E/E [1/60 (1/50) to 1/70 000 s] or fixed E/E
[1/60 (1/50), 1/100 (1/60), 1/250, 1/500, 1/1 000,
1/5 000 and 1/10 000 s]
( ) = PAL mode
• Switchable between NTSC and PAL modes
• Single +3.3 V power supply
• Package :
100-pin LQFP (LQFP100-P-1414) 0.5 mm pin-pitch
LU850425
LU850425
8-bit Microcomputer for
DSP Camera Systems
LU850425
2
PIN CONNECTIONS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
GND
CDS SEL
TV MODE
MODEL
LENS SEL
ADJIN
AGC SEL
ABLC
IRIS
GAMMA
UIN
UOUT
READY
GND
SOUT
SCK
SLDI
TIM SEL
DATA
0
DATA1
DATA2
DATA3
DATA4
DATA5
DATA6
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
GND
EESRB
EEDATA
EECLK
GND
MCO
GND
GND
GND
GND
VD
GND
DAV
R1
DAVR0
VREF OUT
IRIS OUT
GND
IRISSEL
3
IRISSEL2
IRISSEL1
VR
B-Y
R-Y
GND
GND
26272829303132333435363738394041424344454647484950
DATA7
ADD0
ADD1
ADD2
ADD3
ADD4
ADD5
ADD6
NC
NC
XCK
2
XCK1
GND
NCNCNC
NC
DACK
DADT
DASTB
AGND
SPD
WB
IWIND
GND
100
9998979695949392919089888786858483828180797877
76
GND
APT
MIR SET
WBSEL3WBSEL2
WBSEL1NCAEAWB LOCK
ROMDATA
ROMCLK
TEST
VDDGND
OSCINOSCOUT
RESET
GND
GND
GND
GND
GND
GND
SDATA
SCK
NC
100-PIN LQFP
TOP VIEW
(LQFP100-P-1414)
3
PIN DESCRIPTION
LU850425
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
PIN NO.
SYMBOL
POLARITY
I/O DESCRIPTION
1 GND I A grounding pin.
2 CDS SEL I
CDS/AGC IC selection.
When using IR3Y38M, set to H level.
TV standard/CCD selection.I
I
TV MODE
MODEL
3
4
6
Adjustment selection.
H : Camera
L : Adjustment
ADJIN I
5
Selection of output of pin 60 (pin 9 is input H level).
H : Auto exposure lens
L : Passive exposure lens
LENS
SEL
I
IABLC
Selection of auto backlight compensation.
L : ABLC OFF
H : ABLC ON
8
I
AGC SEL
Selection of AGC function.
H:ON
L : OFF
7
IIRIS
Exposure mode selection.
H : Mechanical exposure
L : Electronic exposure
9
10
Selection of gamma correction.
H : ‹ = 1.0
L : ‹ = 0.45
GAMMA I
OUOUT
Outputs the serial data to adjustment tool or PC.
For details, see "Serial Control Interface" in FUNCTIONAL DESCRIPTION.
12
IUIN
The serial data is fed from adjustment tool or PC.
Without input data, keep at H level.
For details, see "Serial Control Interface" in FUNCTIONAL DESCRIPTION.
11
13 Outputs high level at AE/AWB lock mode.READY O
IGND A grounding pin.14
16 Outputs the clock signal to LR38266.SCK O
15 Outputs the serial data to LR38266.SOUT O
OSLDI
Outputs the strobe signal to LR38266. LR38266 latches the serial data from
pin 15 of LU850425 by both SCK and SLDI.
17
HLPin 3
Pin 4 L LH
H
H
L
270 k 320 kCCD 470 k410 k
18
Timing IC selection.
When using LR38578, set to H level.
TIM SEL I
4
LU850425
PIN NO.
SYMBOL
POLARITY
I/O DESCRIPTION
19 DATA
0 I
–
–
IDATA625
–
IDATA524
–
IDATA423
–
IDATA322
–
IDATA221
–
IDATA120
26 DATA
7 I
–
Inputs image data from LR38266.
DATA
0 : LSB
DATA
7 : MSB
Outputs address data to LR38266.
ADD
0 : LSB
ADD6 : MSB
Master clock output.
–
OXCK236
No connection.
–
ONC35
No connection.
–
ONC34
–
OADD633
–
OADD532
–
OADD431
–
OADD330
–
OADD229
–
OADD128
–
OADD027
43 DACK O
–
Outputs the clock signal to MB88346BV. For details, see "TIMING CHART (D)".
42 NC O
–
No connection.
41 NC O
–
No connection.
40 NC O
–
No connection.
39 NC O
–
No connection.
38 GND –
–
A grounding pin.
37 XCK
1 I
–
Master clock input (5.5 MHz, TYP.).
Outputs the strobe signal to MB88346BV. For details, see "TIMING CHART (D)".
–
ODASTB45
Outputs the serial data to MB88346BV. For details, see "TIMING CHART (D)".
–
ODADT44
A grounding pin for D/A output circuit.
–
–AGND46
47 SPD I
–
Inputs DC level to select shutter speed. For details, see "
ELECTRONIC
SHUTTER SPEED CONTROL
" in Preset Function Control.
Inputs DC level to select white balance mode. For details, see "
WHITE
BALANCE
" in Preset Function Control.
–
IWB48
Inputs DC level to select exposure window. For details, see "
(3) Window
Selection of Emphasis Range at Auto Exposure
" in ELECTRONIC SHUTTER
SPEED CONTROL.
–
IIWIND49
50 GND I
–
Not used. A grounding pin.
Not used. A grounding pin.
IGND51
Not used. A grounding pin.
–
IGND52
53 R – Y I
–
Inputs DC level to vary R – Y gain by manual. The detail is shown at "WHITE
BALANCE" in Preset Function Control.
5
LU850425
PIN NO.
SYMBOL
POLARITY
I/O DESCRIPTION
Inputs the reference DC voltage for built-in A/D.
–
IVR55
A grounding pin.
–
IGND59
54 B – Y I
–
Inputs DC level to vary B – Y gain by manual. The detail is shown at "WHITE
BALANCE" in Preset Function Control.
56 IRISSEL
1 I
–
Inputs the preset shutter speed mode 1. (See
"ELECTRONIC SHUTTER SPEED
CONTROL"
in Preset Function Control.)
Inputs the preset shutter speed mode 3. (See
"ELECTRONIC SHUTTER SPEED
CONTROL"
in Preset Function Control.)
–
IIRISSEL358
Inputs the preset shutter speed mode 2. (See
"ELECTRONIC SHUTTER SPEED
CONTROL"
in Preset Function Control.)
–
IIRISSEL257
60 IRIS OUT O
–
Outputs the analog signal to control auto mechanical exposure lens.
Inputs DC reference voltage for built-in D/A output of pin 60.
–
IDAVR062
Outputs the VREF DC to IR3Y38M.
–
O
V
REF
OUT
61
64 GND I
–
Not used. A grounding pin.
63 DAV
R1 I
–
Inputs DC reference voltage for built-in D/A output of pin 61.
A grounding pin.
–
IGND66
Inputs VD signal from LR38266.
–
IVD65
Outputs the clock signal to LR38578.
–
OEECLK72
A grounding pin.
–
IGND71
Inputs MCO signal from LR38266.
IMCO70
A grounding pin.
–
IGND69
A grounding pin.
–
IGND68
A grounding pin.
–
IGND67
Outputs the data signal to LR38578.
–
OEEDATA73
74 EESRB O
–
Outputs the strobe signal to LR38578. This signal makes LR38578 latch the
data of EEDATA (pin 73) by EECLK (pin 72).
75 GND –
–
A grounding pin.
Outputs the clock signal to CDS/AGC (IR3Y38M).
–
OSCK77
No connection.
–
ONC76
A grounding pin.
–
IGND84
A grounding pin.
–
IGND83
A grounding pin.
–
IGND82
A grounding pin.
–
IGND81
A grounding pin.
–
IGND80
A grounding pin.
–
–GND79
Outputs the serial data to CDS/AGC (IR3Y38M).
–
OSDATA78
86 OSC
OUT O
–
No connection.
85 RESET I
–
Inputs the reset signal of LU850425.
A grounding pin.
–
–GND88
A grounding pin.
–
IOSCIN87
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