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| 型号： | SPL11A |
| 厂商： | Electronic Theatre Controls, Inc. |
| 英文描述： | SPL11A PROGRAMMING GUIDE |
| 中文描述： | SPL11A节目指南 |
| 文件页数： | 14/42页 |
| 文件大小： | 1865K |
| 代理商： | SPL11A |
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SPL11A PROGRAMMING GUIDE
PRELIMINARY
5.2
Resistor to Frequency Converter (RFC) Function
Because the heat-resistance sensor and moisture-resistance sensor will change its resistance due the
change of temperature and humidity, RC time constant will also be changed. Programmers can use
this identity to measure temperature or humidity.
5.2.1 P_13H_RFC_CTL ($0013):
RFC Control Register
$00013
b7
b6
b5
b4
b3
b2
b1
b0
Name
-
-
-
-
-
-
-
RFCEN
R/W
-
-
-
-
-
-
-
R/W
Default
-
-
-
-
-
-
-
0
bit
Name
Description
bit0
RFCEN
0: RFC function disable
1: RFC function enable
When RFC (Resistor to Frequency Converter) function is enabled by RFCEN=1, we configure
one of IOA3 (RREF), IOA4(RTH), IOA5(RTMP) to be pass-through & IOA1 (CX) to be
Input-floating to make RFC function.
Sunplus Technology Co., Ltd.
PAGE 14
V0.1 – OCT. 23, 2002
RFC application circuit
Set one of these ports to be
Output High for each
measurement
Input to timer to count RC-pulse number / pulse duration
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