D63711 NEC, D63711 Datasheet - Page 38

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

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(7) 36H command (Settings of EFM output block buffer and RF amplifier external load resistor)
[Functional description]
EFMO:
SEQ:
GR[2:0]:
DEQO:
38
DEQO
MSB
MSB
Remark The mark * indicates the contents set after a reset.
0
GR2
0
Sets EFM comparator output buffer ON or OFF.
Normally, chattering is avoided by using a 2-k
Used when there is an externally attached RF amplifier load.
Used in fine tuning of RF gain when an RF amplifier load is externally attached.
Performed by dividing the variation of 4 dB into five stages.
Switches the RF amplifier output voltage.
When an RFEQ load resistor is externally attached, by setting this register to 2.5 V, the offset can be
adjusted using the external resistor.
GR1
1
GR0
Command
Parameter
1
SEQ
0
Preliminary Product Information S14470EJ1V1PM00
1
0
1
0
EFMO
LSB
LSB
0
resistor on output.
EFMO
DEQO
SEQ
GR2
1
0
1
0
1
1
0
0
0
1
0
* Output buffer OFF
* On-chip RF load
* RFEQ output 1.5 V
GR1
Output buffer ON
External RF load
2.5 V (Offset injection by external resistor)
0
1
0
0
1
RFEQ Output DC Offset Switching
GR0
1
0
0
1
0
EFM Output Buffer
RF Output Load
* +22.0 dB
+18.0 dB
+20.0 dB
(When FE/RF gain is TYP)
+24.0 dB
+26.0 dB
RF Gain Fine Adjustment
PD63711