Pleora Technologies iPort NTx-Pro, Руководство по оборудованию

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Copyright © 2010 Pleora Technologies Inc.
Timing Values for All Cases
From To Symbol
Case 1
(level)
(t
cp
)
Case 2
(edge)
(t
cp
)
Case 3
(both)
(t
cp
)
FVAL valid
LVAL valid
a
t
FV2LV
0
b
0
c
1
FVAL valid
data valid
a,d,e
t
FV2DV
0
b
16
c,g
1
LVAL valid
data valid
a,d,e
t
LV2DV
0 1 0
LVAL valid
LVAL invalid
a
t
LV2LI
1 1 1
LVAL invalid
LVAL valid
a
t
LI2LV
1 1 1
LVAL invalid
(Automatic Internal Retrigger dis-
abled)
data valid
a,d,e
t
LI2DV
1 na 1
LVAL invalid
(Automatic Internal Retrigger enabled) data valid t
LI2DV
16
g
na
16
g
Data invalid
LVAL invalid
a,d,e
t
DI2LI
0 na 0
LVAL invalid
FVAL invalid
a
t
LI2FI
0
f
na na
Data invalid
FVAL invalid
a,d,e
t
DI2FI
0
f
na na
FVAL invalid
FVAL valid
a
t
FI2FV
1 1 1
FVAL invalid
data valid
a,d,e
t
FI2DV
1 na na
Last LVAL invalid data valid t
LLI2DV
16
g
na
16
g
FVAL valid FVAL invalid t
FV2FI
16
g
1 1
FVAL valid FVAL valid t
2FV2FV
17
g
17
g
17
g
a. The valid state of FVAL and LVAL is high when they’re set as level-high sensitive or rising-edge sensitive. Their
valid state is low when they’re set as level-low sensitive or falling-edge sensitive.
b. If LVAL is valid before FVAL becomes valid, then the grabber drops the full line.
c. The configuration FVAL as level-sensitive and LVAL as edge-sensitive is invalid and is seen as FVAL and LVAL
being both edge-sensitive.
d. Data valid is defined by FVAL valid (note a), LVAL valid (note a), and DVAL valid (note e).
e. The valid state of DVAL is high when it is set as level-high sensitive, and low when set as level-low sensitive.
DVAL is always valid in the grabber when the parameter PixelBusDataValidEnabled is off.
f. If FVAL becomes invalid and LVAL is still valid, the line is truncated.
g. This is a worst-case value. Subtract 3 cycles if the pixel type is 8-bit, 1-tap. Subtract 1 cycle for all other pixel
types except 10/12-bit, 2-tap, unpacked, and RGB unpacked. Subtract up to 7 cycles if the image size is a multiple
of 32 bytes.
NOTE! The timing values stated in the table above are minimum values only.