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PDF LU850425 Data sheet ( Hoja de datos )
| Número de pieza | LU850425 | |
| Descripción | 8-bit Microcomputer for DSP Camera Systems | |
| Fabricantes | Sharp Electrionic Components | |
| Logotipo |  |
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LU850425
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
8-bit Microcomputer for
DSP Camera Systems
In the absence of confirmation by device specification sheets, SHARP takes no responsibility for any defects that may occur in equipment using any SHARP devices shown in
catalogs, data books, etc. Contact SHARP in order to obtain the latest device specification sheets before using any SHARP device.
1
1 page  
LU850425
PIN NO. SYMBOL I/O POLARITY
DESCRIPTION
54 B – Y
Inputs DC level to vary B – Y gain by manual. The detail is shown at "WHITE
I–
BALANCE" in Preset Function Control.
55 VR
I – Inputs the reference DC voltage for built-in A/D.
56 IRISSEL1 I
Inputs the preset shutter speed mode 1. (See "ELECTRONIC SHUTTER SPEED
–
CONTROL" in Preset Function Control.)
57 IRISSEL2 I
Inputs the preset shutter speed mode 2. (See "ELECTRONIC SHUTTER SPEED
–
CONTROL" in Preset Function Control.)
58 IRISSEL3 I
Inputs the preset shutter speed mode 3. (See "ELECTRONIC SHUTTER SPEED
–
CONTROL" in Preset Function Control.)
59 GND
I – A grounding pin.
60 IRIS OUT O
– Outputs the analog signal to control auto mechanical exposure lens.
61 VREF OUT O
– Outputs the VREF DC to IR3Y38M.
62 DAVR0
I – Inputs DC reference voltage for built-in D/A output of pin 60.
63 DAVR1
I – Inputs DC reference voltage for built-in D/A output of pin 61.
64 GND
I – Not used. A grounding pin.
65 VD
I – Inputs VD signal from LR38266.
66 GND
I – A grounding pin.
67 GND
I – A grounding pin.
68 GND
I – A grounding pin.
69 GND
I – A grounding pin.
70 MCO
I
Inputs MCO signal from LR38266.
71 GND
I – A grounding pin.
72 EECLK O – Outputs the clock signal to LR38578.
73 EEDATA O
– Outputs the data signal to LR38578.
Outputs the strobe signal to LR38578. This signal makes LR38578 latch the
74 EESRB O –
data of EEDATA (pin 73) by EECLK (pin 72).
75 GND
– – A grounding pin.
76 NC
O – No connection.
77 SCK
O – Outputs the clock signal to CDS/AGC (IR3Y38M).
78 SDATA O – Outputs the serial data to CDS/AGC (IR3Y38M).
79 GND
– – A grounding pin.
80 GND
I – A grounding pin.
81 GND
I – A grounding pin.
82 GND
I – A grounding pin.
83 GND
I – A grounding pin.
84 GND
I – A grounding pin.
85 RESET I – Inputs the reset signal of LU850425.
86 OSCOUT
O
– No connection.
87 OSCIN
I – A grounding pin.
88 GND
– – A grounding pin.
5
5 Page 
TIMING CHART
(A) LU850425 (µCOM),/BF24C04F (EEPROM)
1. Write Mode (Writing data that is sent from the adjustment tool to the EEPROM.)
RMCK
RMDA
Start
12.5 µs
11 µs
88 µs
5 µs
5.5 µs
Stop
10 10 0 0 0 0
WA7 WA6 WA0 D7 D6
D0
Chip Address
ACK Word Address ACK Write Address ACK
LU850425
2. Read Mode
RMCK
RMDA
11 µs
11 µs 88 µs
29 µs
11 µs
11 µs
Start
1 0 1 0 0 0 0 0 WA7 WA0
Chip Address
ACK ACK
Word
Address
1 01 0 0 0 01
Chip Address
D7 D0
Read Data
ACK
[Address 0
EPROM data]
RMCK
11 µs Stop
RMDA
D7 D0
D7 D0
ACK Read Data ACK Read Data ACK
[Address 1 [Address 255
EPROM data] EPROM data]
EEPROM MARK
tHIGH
tLOW
tHD : STA
tSU : STA
tSU : STO
MINIMUM (µs)
11
88
11
11
11
11
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet LU850425.PDF ] | |
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