Konica Minolta PCI-1712 사용자 설명서
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APPENDIX D
PCI-1712/1712L User’s Manual
Advantech Co., Ltd.
www.advantech.com
www.advantech.com
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D.13 82C54 counter chip 1
—
Write/Read BASE+18 to 1E
Table D-14: Register for 82C54 counter chip 1
This counter chip 82C54 includes three counters for general purpose.
These three counters are identical. They can do event counting, rate
generation, one shot, frequency measurement and pulse width
measurement. Please refer to chapter 5.3 for more details about the
principles of operation. In order to explain the functions of three
counters clearly, we adopt a naming rule to designate the counter
number. For example, as you will see in the subsequent sections, there
are many registers with names like Cn0, CPn, CQn, etc. Note that the
“n” in these register names represents the counter number that is
concerned.
These three counters are identical. They can do event counting, rate
generation, one shot, frequency measurement and pulse width
measurement. Please refer to chapter 5.3 for more details about the
principles of operation. In order to explain the functions of three
counters clearly, we adopt a naming rule to designate the counter
number. For example, as you will see in the subsequent sections, there
are many registers with names like Cn0, CPn, CQn, etc. Note that the
“n” in these register names represents the counter number that is
concerned.