CD9256

CD9256GP CD9256GP DTS CMOS AM FM CD9256GP CPU CD9256GP DIP16 Hi-Fi FM 20 130MHz AM 0.4 30MHz 12 2 75kHz 7 25k 12.5k 6.25k 5k 3.125k 3k 1k 20 16ms 32ms CPU 3V DIP16 1.3 2003-02-24 1 9 CD9256GP PD1 VSS XOUT XIN CE CK DA CD 1 2 3 4 5 6 7 8 16 VDD1 15 VDD2 14 FMIN 13 AMIN 12 P2 11 IFIN 10 P1 9 P0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 ISC IC O1 ODPD AP TO1 PS PD1 VSS XOUT XIN CE CK CLOCK DA CD P0 N P1 N IFIN P2 AMIN FMIN VDD2 VDD1 N AM FM CMOS Schmitt CMOS CMOS N TO1 PS O1 IC ISC ISC ISC ODPD ODPD ODPD AP ODPD AP AP PS PS 29 CD9256GP FM AM XIN XOUT CE DA CK AMP 1/2 4 4 H AMP L/H L 12 12 23 3 32 32 32 2 P0 P1 P2 4 PD1 IF AMP 20 20 24 CD CD9256GP FM AM IF CD9256GP CPU 1. CD9256GP A. FM FM 20 MHz 130MHz 100mV FM 10nF FM B. AM IF FM AM 0.4 MHz 30MHz IF 0.4 MHz 16MHz 70mV C. 75kHz 2. 4 12 16 17 CD9256GP 17 4 CPU CD9256GP 0 17 16 12 12 CPU 16 0 39 CD9256GP CPU 4 A 12 B Fref 4 0 17 0 16 12 B-A 0 17×A+16×(B-A)=16B+A 16B+A Fref×(16B+A) 3. CPU OSC 75kHz CPU R0 R1 R2 0 0 0 OSC/3 25k 0 0 1 OSC/6 12.5k 0 1 0 OSC/12 6.25k 0 1 1 OSC/15 5k 1 0 0 OSC/24 3.125k 1 0 1 OSC/25 3k 1 1 0 OSC/75 1k 1 1 1 Standby Standby FM AM PD1 4. CPU CPU 32 32 32 CPU 16 D0 D1...