參數(shù)資料
型號(hào)： PE12316
廠商： Electronic Theatre Controls, Inc.
英文描述： Triple Incremental Encoder
中文描述： 三增量編碼器
文件頁(yè)數(shù)： 9/29頁(yè)
文件大?。?/td> 1542K
代理商： PE12316
PE12316
Triple
Incremental Encoder
February 6, 2003 Preliminary (Version 1.1)
MODE 6: Pulse Width Measurement Mode
In this mode, Ua1n acts as a gate, and is the
pulse width to be measured. Synchronised with
the clock edge after a low to high transition in
Ua1n, counting begins at the input clock
frequency. Similarly, synchronised with the clock
edge after a high to low transition of Ua1n,
counting is disabled; the value in the counter is
loaded in the output register; /KLI-KLOn is pulled
low; and then the counter clears. See
Figure 6
.
If Ua2n is held high, the counter will count up,
and if Ua2n is held low, the counter will count
down.
Each counter can be preloaded in two or three
bytes depending on 16 Bit or 24 Bit Mode by
activating /CS, and /WE, and selecting the
required byte with /A0 and /A3, and the required
channel with /A1 and /A2.
February 6, 2003 (Preliminary Version 1.1)
Page 9/29
PE12316
This must be done while Ua1n is low. The output
register should be read by activating /CS, /RD,
and selecting the individual bytes with /A0 after
Ua1n has fallen and before the next preload
takes place.
The KLI-KLOn signal may be used as an interrupt
to indicate to the processor when the output
register has been loaded. In both the pulse width
and frequency modes, the output register will not
be loaded via /CS and /RD, but by the falling
edge of Ua1n, or by pulling /KLI-KLOn low.
Figure 6 Pulse Width Measurement
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