Sharp LR38516 Datasheet
DESCRIPTION
The LR38516 is a CMOS timing generator IC
which is designed for video-camcorders, and which
generates timing pulses for driving 350 k-pixel
progressive scan color CCD area sensors,
synchronous pulses for TV signals and processing
pulses for video signals.
FEATURES
• Designed for 350 k-pixel progressive scan color
CCD area sensors
• Frame rate : 30 frame/s
• Shutter speed can be controlled in 1H period
using a serial code
• TV mode selection, power mode selection and
the phase selection of DCLK can be also
controlled by using a serial code
• +3 V, +4.5 V and +5 V power supplies
• Package :
48-pin QFP (QFP048-P-0707) 0.5 mm pin-pitch
PIN CONNECTIONS
LR38516
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
LR38516
Timing Generator IC for 350 k-pixel
Progressive Scan Color CCDs
1
48 47 46 45 44 43 42 41 40 39 37
13 14 15 16 17 18 19 20 21 22 23 24
2
3
4
5
6
7
8
9
10
11
12
36
35
34
33
32
31
30
29
28
27
26
25
VTAX
VTBX
VTCX
VTDX
OFDX
V
DD3
GND
VHAX
VHCX
ID
WEN
TST
1
DBLK
GND
ADCK
NC
V
DD4
FH
2
GND
FH1V
DD4
CLRX
CCD
2
CCD
1
TST3
ED
2
ED
1
ED
0
HD
GND
V
DD3
DMVD
DCLK
CLK
CKO
CKI
PBLK
BCPX
BPX
CLPX
GND
FCDS
FS
V
DD5
RS
FR
GND
TST
2
38
48-PIN QFP
TOP VIEW
(QFP048-P-0707)
LR38516
2
BLOCK DIAGRAM
TST3
ED2
ED1
ED0
HD
GND
V
DD3
DMVD
DCLK
CLK
CKO
CKI
36 35 34 33 32 31 30 29 28 27 26 25
TST
2
GND
FR
RS
V
DD5
FS
FCDS
GND
CLPX
BPX
BCPX
PBLK
VTAX
VTBX
VTCX
VTDX
OFDX
V
DD3
GND
VHAX
VHCX
ID
WEN
TST
1
CCD1
CCD2
CLRX
V
DD4
FH1
GND
FH
2
VDD4
NC
ADCK
GND
DBLK
1/2 1/2
H COUNTER
RESET
OSC
RESET GATE
DECODER
RESET
1/2
DATA LATCH & SHUTTER CONTROL
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14
15
16
17
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20
21
22
23
24
123456789101112
48
47
46
45
44
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37
LEVEL
SHIFTER
V COUNTER
LR38516
3
PIN NO.
SYMBOL I/O
POLARITY
PIN NAME DESCRIPTION
1 VTAX O3
Vertical transfer
pulse output 1
A vertical transfer pulse for CCD.
Connect to V
1AX pin of the vertical driver IC.
For details, see "
CONNECTION OF VERTICAL TRANSFER PULSES
".
2 VTBX O3
Vertical transfer
pulse output 2
A vertical transfer pulse for CCD.
Connect to V
2AX pin of the vertical driver IC.
For details, see "
CONNECTION OF VERTICAL TRANSFER PULSES
".
3 VTCX O3
Vertical transfer
pulse output 3
A vertical transfer pulse for CCD.
Connect to V3AX pin of the vertical driver IC.
For details, see "
CONNECTION OF VERTICAL TRANSFER PULSES
".
4 VTDX O3
Vertical transfer
pulse output 4
A vertical transfer pulse for CCD.
Connect to V4AX pin of the vertical driver IC.
For details, see "
CONNECTION OF VERTICAL TRANSFER PULSES
".
5 OFDX O3 OFD pulse output
A pulse that sweeps the charge of the photo-diode
for the electronic shutter. Connect to OFD pin of CCD
through the vertical driver IC and DC offset circuit.
Held at H level at normal mode.
6VDD3 – Power supply Supply of +3 V power.
A grounding pin.Ground–GND7–
9 VHCX O3
Readout pulse
output 3
A pulse that transfers the charge of the photo-diode to
the vertical shift register.
For details, see "
CONNECTION OF VERTICAL TRANSFER PULSES
".
8 VHAX O3
Readout pulse
output 1
A pulse that transfers the charge of the photo-diode to
the vertical shift register.
For details, see "
CONNECTION OF VERTICAL TRANSFER PULSES
".
The pulse is used in color separator. The signal
switches H and L at every line.
H : R color line
L : B color line
Line index pulse
output
O3ID 10
11 WEN O3 Write enable output Write enable output for low-speed shutter pulse.
A test pin. Set open or to L level in the normal mode.Test pin 1ICD3TST
112 –
13 PBLK O5
Pre-blanking pulse
output
A pulse that corresponds to the cease period of the
horizontal transfer pulse.
A pulse to clamp the optical black signal.
Output stays low during the absence of effective pixels
within the vertical blanking.
Optical black clamp
pulse output
O5BCPX 14
–
PIN DESCRIPTION
15 BPX O5 Clamp pulse output
A pulse to clamp the signal. The phase is same as BCPX
(pin 14). This pulse is continuous at horizontal cycle.
A pulse to clamp the dummy outputs of CCD. The pulse
stays high during the sweep-out period.
Clamp pulse outputO5CLPX16
17 GND – Ground A grounding pin.
–
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