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h'10[D1]NIR_Fil_en
To use NIR filter (h'10[D1]NIR_Fil_en = "1"), Set following registers for the threshold level of NIR
filter's detection (h'0D[D0], h'0F[D0], h'12[D1:D0], h'13[D0], h'1A[D0], h'1B[D0], h'1C[D2:D0]),
according to the Detection selections (Delay Detection; h'10[D0]Sel_Det = "0" / Pulse Count Detection;
h'10[D0]Sel_Det = "1" ). Table 6-20 is a recommended setting by Toshiba.
h'10[D1]
h'10[D0]
Register value for the threshold level of NIR filter's detection (Recommended value)
NIR_Fil_en
Sel_Det
0
-
h'0F[D0]NIR_L2
h'1C[D1]NIR_L1
h'1C[D0]NIR_L0
0
h'0F[D0]NIR_L2
1
h'1C[D1]NIR_L1
h'1C[D0]NIR_L0
h'0F[D0]NIR_L2
1
h'1C[D1]NIR_L1
h'1C[D0]NIR_L0
(2)
IF Detector
Select a type of IF Detections (Delay Detection / Pulse Count Detection) by the value of
register:h'10[D0]. Select either detector suitable to the application. Both Delay Detection and Pulse
Count Detection can convert input signal frequency (0-500 kHz) to voltage output. In Pulse Count
Detection, over 500 kHz input signal frequency is converted to the voltage output equal to 500 kHz. In
Delay Detection, the characteristic of S curve is mirror inverted at 500 kHz signal input. Select the
High Frequency Detector by the value of register:h'0F[D4] in Delay Detection, over 500 kHz input
signal frequency is converted to the voltage output equal to 500 kHz.
Notice:
-
IF filter characteristics affects the maximum available signal frequency of High Frequency
Detector.
Table 6-19 Settings of NIR Filter
h'1B[D2]NIR_Frqth1 h'1B[D1]NIR_Frqth0
0
X
1
0
1
0
1
1
1
1
Table 6-20 Settings of NIR Filter (Recommended Value)
1 h'1B[D0]NIR_2L1 1
1 h'1C[D2]NIR_2L0 0
0
-
1 h'1B[D0]NIR_2L1 1
1 h'1C[D2]NIR_2L0 0
0
-
0 h'1B[D0]NIR_2L1 1
0 h'1C[D2]NIR_2L0 1
0
-
Table 6-21 Settings of IF Detector / High Frequency Detector
h'10[D0]Sel_Det
h'0F[D4]Hdet_en
0
0
0
1
1
X
X
0
1
0
1
Don't care
h'0D[D0]NIR_H2 0 h'12[D0]NIR_2H1
h'13[D0]NIR_H1 0 h'12[D1]NIR_2H0
-
h'1A[D0]NIR_H0 0
h'0D[D0]NIR_H2 0 h'12[D0]NIR_2H1
h'13[D0]NIR_H1 0 h'12[D1]NIR_2H0
-
h'1A[D0]NIR_H0 0
h'0D[D0]NIR_H2 0 h'12[D0]NIR_2H0
h'13[D0]NIR_H1 0 h'12[D1]NIR_2H1
-
h'1A[D0]NIR_H0 0
Status
Delay Detection: High Frequency Detector Disable
Delay Detection: High Frequency Detector Enable
Pulse Count Detection
23
TC32306FTG
Filter Enable/Disable
& Notch Frequency
Disable: -
Enable: 631 kHz
Enable: 659 kHz
Enable: 689 kHz
Enable: 712 kHz
X: Don't care
Detection
-
0
0
-
-
Delay
Detection
0
1
-
-
0
Pulse
0
Count
Detection
-
-
X: Don't care
2015-10-01
NIR Filter
Performance
(IC Application)
-
After the interference
is detected, NIR filter
becomes valid and
stays to it.
(for intermittent RX)
Validity of NIR filter is
depending
on
the
detection
of
the
interference.
(for continuous RX)
NIR filter is always
valid.
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