FUNCTION OF MICOM IC
9-2. PIN DESCRIPTIONS
PINPIN NAMEDESCRIPTIONI/O
1XINCONNECTION TO 4.5 MHz CRYSTALI
80XOUTO
78EO1OUTPUT COMPAIRED WITH PHASEO
77EO2IF LOCAL OSCILLATION FREQUENCY IS HIGHER THANO
STANDARD FREQUENCY.
OUTPUT IS HIGH, IF NOT OUTPUT IS LOW, AND IF SAME OUTPUT
IS HIGH-Z.
71EO3OUTPUT TERMINAL FOR AM 2ND CHANGE PUMP.O
(IF STANDARD FREQUENCY OF AM IS 90kHZ)
--REFER TO ATTACHED PAGE.
76VSSPOWER TERMINAL
73,31VDD
75FMININPUT TERMINAL IF FM VCO(LOCAL OSCILLATION)I
INPUT RANGE:
74AMININPUT TERMINAL IF AM VCO(LOCAL OSCILLATION)I
INPUT RANGE:
72SUBPDOUTPUT OF PLL LOCK UP SUB FOR SPEEDY PLL LOCK.O
REFER TO ATTACHED PAGE ABOUT CIRCUIT USED.
70HCTRINPUT TERMINAL OF FM IF COUNTI
INPUT RANGE : 107MHz + 30kHz, Vpp=
69LCTRINPUT TERMINAL OF AM IF COUNTI
INPUT RANGE : 450kHz + 1kHz (AM)
: 450kHz + 0.37kHz (LW)
Vpp=
68SNS_PART THAT CHECKS DAMAGE OF BACK-UP MEMORY AFTERI
COMING BACK TO (BACK-UP)MODE.
REFER TO ATTACHED PAGE ABOUT CIRCUIT USED.
67HOLD_CONTROL TERMINAL OF BACK UP MODE.I
IF INPUT IS HIGH, WORKING IS NORMAL.
IF INPUT IS LOW, IT REVERTS TO BACK UP MODE.
IF INPUT OF (ACC)IN IS LOW ACCORDING TO CLOCK OPTION
CLOCK IS DISPLAYED.
79TEST1TEST PORT (CONNECTED TO GROUND)-
2TEST2-
12PE2RECEIVING RDS DATA FROM RDS DEMODULATOR IC.I
11PE3REFER TO ATTACHED PAGE ABOUT DATA TIMING CHART.I
55INT1I
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ACEC
DAEWOO
