CXA1797Q
4. Control pin usage
1) REC VOL
Connect a 50 kΩ variable resistor to this pin; this pin controls the electronic volume according to the
voltage (between DVCC and DGND) applied to this pin.
(Although other resistances and voltages can be used, the gain when the volume is at the center will
differ.)
2) REC BAL
This pin controls the electronic volume balance.
(Both channel sounds are output when voltage of (DVCC + DGND)/2 is applied to this pin or when it is
open. When DVCC voltage is applied, only the CH1 sound is output, and when DGND voltage is
applied, only the CH2 sound is output.)
3) REC CAL
This pin adjusts the overall gain for the recording equalizer amplifier. (The gain is at the center when
voltage of (DVCC + DGND)/2 is applied to this pin or when it is open.)
4) FQ CAL
This pin adjusts the high-frequency peak Q value for the recording equalizer amplifier. (FP and GP also
change.)
(The value is at the center when voltage of (DVCC + DGND)/2 is applied to this pin or when it is open.)
5) GH CAL
This pin adjusts the middle/high frequency gain for the recording equalizer amplifier.
(The gain is at the center when voltage of (DVCC + DGND)/2 is applied to this pin or when it is open.)
GP/FP
Low-frequency boost (external)
RECCAL
GH
FQ
Frequency (Hz)
—23—
SONY [ SONY CORPORATION ]
