LUPA-4000 CYPRESS [Cypress Semiconductor], LUPA-4000 Datasheet - Page 34

• Manufacturer Part Number: LUPA-4000
• Description: 4M Pixel CMOS Image Sensor
• Manufacturer: CYPRESS [Cypress Semiconductor]

4.2.3 Precharging of the buses
This timing mode is exactly the same as the mode without sample and hold, except
that the prebus1 and prebus2 signals are activated. It should be noticed that the
precharging of the buses can be combined with all of the timing modes discussed
above. The idea is to have a short pulse of about 5ns to precharge the output buses to
a well-known level. This mode makes the ghosting of bad columns impossible.
In this mode, Nsf_load must be made much larger (at least 1Mohms).
Contact:
Cypress Semiconductor Corporation
LUPA-4000
Data Sheet
[e-mail]
Table 14: Read-out timing specifications with precharching of the buses
Figure 20: X- and Y-addressing with precharging of the buses
Symbol
a
b
c
d
e
f
g
h
i
Document #: 38-05712 Rev.**(Revision 1.2 )
Name
Sync_Y
Sync_Y-Clock_Y
Clock_Y-Sync_Y
NoRowSel
Pre_col
Sh_col
Voltage averaging
Sync_X-Clock_X
Prebus pulse
3901 North First Street
Value
>20ns
>0ns
>0ns
>50ns
>50ns
200ns (or cst
high,
depending on
timing mode)
>20ns
>0ns
As short as
possible
San Jose, CA 95134
Page 34 of 49
408-943-2600