Installation
•
13
2.8
Clock System
The clock system of PCI-8554 provides the internal clock source for
the 8254 chips. The clock of counter / timer #1 ~ #10 can be one of
the 4 sources:
external clock source
or
cascaded source
from the
‘last’ channel or
CK1
or
COUT10
. The next section will give you detail
description about setting clock for each counter / timer and definition
of
CK1
. The clock of counter / timer #11 is fixed at 8Mhz, and clock of
counter / timer #12 is connected to
COUT11
Содержание PCI-8554
Страница 1: ...NuDAQ PCI 8554 Multi functions Counter Timer Card User s Guide Recycled Paper...
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Страница 11: ...Introduction 3 The second interrupt source comes from external source 100 pin SCSI II female connector PCI Bus...
Страница 13: ...Introduction 5 Humidity 5 95 non condensing Power Consumption 5 V 350 mA typical Dimension 134mm L X 107mm W...
