參數(shù)資料
型號(hào)： KS8701
廠商： SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述： FLEXTM Roaming Decoder II
中文描述： FLEXTM漫游解碼器二
文件頁數(shù)： 20/73頁
文件大?。?/td> 434K
代理商： KS8701
KS8701
Host-to-Decoder Packet Descriptions
FLEX
TM
Roaming Decoder II
19
OFD:
Oscillator Frequency Difference. These bits describe the maximum difference in the frequency of the
76.8 kHz oscillator crystal with respect to the frequency of the transmitter. These limits should be the
worst case difference in frequency due to all conditions including but not limited to aging, temperature,
and manufacturing tolerance. Using a smaller frequency difference in this packet will result in lower
power consumption due to higher receiver battery save ratios. Note that this value is not the absolute
error of the oscillator frequency provided to the KS8701. The absolute error of the clock used by the
FLEX transmitter must be taken into account. (e.g. If the transmitter tolerance is +/- 25 ppm and the
76.8 kHz oscillator tolerance is +/-140 ppm, the oscillator frequency difference is +/- 165 ppm and
OFD
should be set to 0.)(value after reset=0)
OFD
1
0
0
1
1
OFD
0
0
1
0
1
Frequency Difference
+/- 300 ppm
+/-150 ppm
+/- 75 ppm
+/- 0 ppm
PCE:
Partial Correlation Enable. When this bit is set, partial correlation of addresses is enabled. When
partial correlation is enabled, the KS8701 will shutdown the receiver before the end of the last FLEX
block which contains addresses if it can determine that none of the addresses in that FLEX block will
match any enabled address in the KS8701. When this bit is cleared, the receiver will be controlled as it
was in previous versions of the IC.(value after reset=0)
SP:
Signal Polarity. These bits set the polarity of
EXTS1
and
EXTS0
input signals. (value after reset=0)
The polarity of the
EXTS0
and
EXTS1
bits will be determined by the receiver design.
SP
1
SP
0
Signal Polarity
EXTS1 EXTS0
FSK
Modulation
@SP = 0, 0
EXTS1
EXTS0
0
0
Normal
Normal
+4800 Hz
1
0
0
1
Normal
Inverted
+1600 Hz
1
1
1
0
Inverted
Normal
-1600 Hz
0
1
1
1
Inverted
Inverted
-4800 Hz
0
0
SME:
Synchronous Mode Enable. When this bit is set, a Status Packet will be automatically sent whenever
the
SMU
(synchronous mode update) bit in the Status Packet is set. The host can use the
SM
(synchronous mode) bit in the Status Packet as an in-range/out-of-range indication. (value after
reset=0)
MOT:
Maximum Off Time. This bit has no effect if
AST
in the Timing Control Packet is non-zero. When
AST
=0 and
MOT
=0, asynchronous A-word searches will time-out in 4 minutes. When
AST
=0 and
MOT
=1, asynchronous A-word searches will time-out in 1 minute. (value after reset=0)
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