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P-QFP048-0707 データシートの表示(PDF) - Sharp Electronics

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P-QFP048-0707 Single-chip Driver IC for 270 k/320 k-pixel B/W CCDs with Dual-power-supply Operation Sharp
Sharp Electronics Sharp
P-QFP048-0707 Datasheet PDF : 9 Pages
1 2 3 4 5 6 7 8 9
LR38585
PIN NO. SYMBOL IO SYMBOL POLARITY
PIN NAME
DESCRIPTION
12 VD
O
Vertical drive pulse
The pulse occurs at the start of every field.
output
An input pin for line-lock pulse.
The priority is lower than VD2I (pin 14).
13 LLIN
ICSU
The inner mono-multivibrator is operated by the falling-
– Line-lock pulse input
edge of LLIN. The width of mono-multivibrator output is
determined by R and C which are connected with RCIO
(pin 32).
14 VD2I
ICSU
External VD pulse
input
An input pin for external VD pulse.
The priority is higher than LLIN (pin 13).
15 VRI
ICSU
An input pin for resetting internal vertical counter.
– Vertical reset input
The input pulse is VSYNC (negative polarity).
16 V1
O4MA2
Vertical transfer
pulse output 1
A pulse to drive vertical CCD shift register.
Connect to ØV1 pin of the CCD.
17 V2
O4MA2
Vertical transfer
pulse output 2
A pulse to drive vertical CCD shift register.
Connect to ØV2 pin of the CCD.
18 V3
O4MA2
Vertical transfer
pulse output 3
A pulse to drive vertical CCD shift register.
Connect to ØV3 pin of the CCD.
19 V4
O4MA2
Vertical transfer
pulse output 4
A pulse to drive vertical CCD shift register.
Connect to ØV4 pin of the CCD.
20 TST3
ICD – Test pin 3
A test pin. Set open or to L level in normal mode.
21 GND
– Ground
A grounding pin.
22 VTG
O12MHV
Readout pulse
output
A pulse that transfers the charge of the photo-diode to
the vertical shift register.
Connect to the VTG pin of the CCD.
23 VDD12
– Power supply
Supply of +12.5 V power.
A pulse that sweeps the charge of the photo-diode for
24 OFD O12MHV
OFD pulse output electronic shutter. Connect to OFD of the CCD.
Held at L level in normal mode.
An input pin for reference clock oscillation.
Connect to OSCO (pin 26) with R.
The frequencies are as follows :
25 OSCI
OSCI – Clock input
TVMD
Frequency
L
19.0699 MHz (1 212 fH)
H
19.3125 MHz (1 236 fH)
fH = Horizontal frequency
26 OSCO OSC3M – Clock output
An output pin for reference clock oscillation.
The output is the inverse of OSCI (pin 25).
27 TST4
ICD – Test pin 4
A test pin. Set open or to L level in normal mode.
4
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