PI409MC-A4 American Microsystems, Inc., PI409MC-A4 Datasheet - Page 7

• Manufacturer Part Number: PI409MC-A4
• Description: 400dpi CIS Module
• Manufacturer: American Microsystems, Inc.

Note1:
"Prohibit crossing of start pulse" is to indicate that the start pulse should not be active high
between any two consecutive high going clock pulse or two consecutive low going clock
pulses. See the timing diagram. Only one high going clock under the active high start
pulse initiates the internal shift register, and it must not be active over two high going
clocks. All low going clock pulses will not initiate the shift register. To ensure that the
start pulse will not be actively high during two consecutive high going clocks, the circuit
should be design to keep the start pulse active only for one high going clock cycle.
Item
Clock cycle time
Clock pulse width
Clock duty cycle
Prohibit crossing time
of Start Pulse
Data setup time
Data hold time
Signal delay time
Signal settling time
CP
SP
Vout
tds
(1)
Table 6. Timing Symbol’s Definition and Timing Values.
MODULE TIMING DIAGRAM
tprh
to
tdh
Symbol
to
tw
tprh
tds
tdh
tdl
tsh
PAGE 7 OF 8 - PI409MC-A4, 11-15-00
FIGURE 4
tsh
0.20
50
25
0
20
0
20
100
tdl
Min.
tw
Typical
4.0
75
Max.
ns
%
ns
ns
ns
ns
ns
s
Units