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KRC-851D
CIRCUIT DESCRIPTION
IC6: LC7218
External PLL IC
XIN
X OUT
CE
VSS
DATA IN
CLK
PD
DATA OUT
VDD
SY
FM OSC IN
SD
AM OSC IN
MT
FM
T/R
LOCAL
AFC
AM
BS
AGC
External PLL Port Assignment
LC7218 Port Functions
Function
Stop level detect port, active "L".
Effective for FM, MW and LW.
Band mute detect port, active "H".
Effective for FM.
Note:
For MW or LW, SD1 only is detected. For FM, SD1 and SD2 are detected.
For timing, refer to the timing chart.
"L" output during TAPE mode and "H" output during TUNER mode. (With power
OFF or ACC "L", keep as it stands.)
Local control output.
"H" with local ON ("H" only during tuning operation because of local seek
operation).
FM AFC time-constant select output.
Active "L" during tuning operation.
AM AGC-CUT output.
Active "L" during tuning operation.
AM band selector.
Effective for Europe band.
"L" for MW, "H" for LW and "H" for FM.
AM+8B, Active "L".
FM+B, Active "L".
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