D63711 NEC, D63711 Datasheet - Page 32

• Manufacturer Part Number: D63711
• Description: Search -----> UPD63711
• Manufacturer: NEC

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(2) 31H command (Settings of 3T component detection gain, 3T detection circuit LPF, and TE amplifier gain)
[Functional description]
G3[2:0]:
F3[1:0]:
GF5:
GTU[1:0]:
32
GTU1 GTU0
MSB
MSB
Remark The mark * indicates the contents set after a reset.
0
0
Used in setting the 3T detection circuit sensitivity.
When disturbance is injected into the FE system, an amplitude of approximately 2.0 V
the default state when the RF signal fluctuates 20%.
The LPF for eliminating noise after S/H in the 3T detection circuit.
Since S/H samples using an EFM high frequency signal, LPF is set for stability.
Adjusts the FE amplifier gain.
Changes the input resistor value of the FE amplifier second stage.
Used with the GF4 bit of the 32H command.
Used to raise the TE amplifier gain.
Switches the gain by changing the input resistor value. Note that GTU0 and GTU1 cannot be used
together.
F31
1
F30
Command
Parameter
1
GF5
0
G32
Preliminary Product Information S14470EJ1V1PM00
0
G31
0
LSB
LSB
G30
1
GTU1
GF5
G32
F31
1
1
1
0
0
0
0
1
1
0
0
1
0
0
0
0
1
GTU0
GF4
G31
F30
0
1
1
0
0
1
1
1
0
1
0
0
0
1
0
1
0
* 0 dB
* fc = 100 kHz
* +14 dB
G30
+2.5 dB
+6.0 dB
fc = 50 kHz
fc = 200 kHz
(On gain TYP setting of 32H
command)
+6 dB up
+12 dB up
2.0 dB
1
0
1
0
1
0
1
TE Amplifier Gain Adjustment
FE Amplifier Gain Adjustment
3T Circuit LPF after S/H
* +20.0 dB
+8.0 dB
+14.0 dB
+16.5 dB
+23.5 dB
+26.0 dB
+28.0 dB
3T Detection Circuit Gain
p-p
is obtained in
PD63711