ICP DAS USA PCI-D64HU, User Manual, Page: 14 / 128

PCI-D64HU User’s Manual (Ver.1.0, Dec/2009)
14
2.5. Timing Characteristic
Characteristic of Input Digital Filter
The digital filter is applicable for all DI signals, IREQ, ITRG and OACK. The
maximum removable noise width can be programmed from (1~127) x 25ns.
Where n=1~127
Characteristic of Output Pulse Extender in Timer Pacer Mode
System CLK 40MHz
tS
tH
O_REQ
( Output Signal )
DO0 ~ DO31
( Output Signal )
25ns
<= tS <= (
2^(n+1)) * 25ns
tH =
(2^(n+1)) * 25ns
Valid Data
tL
tL >=
(2^(n+1)) * 25ns
Notes: n = 0~7