Ic Pin Function Description - Sony HCD-EP303 Service Manual

6-12. IC Pin Function Description

• IC601 µPD753016AGC-F37-3B9
Pin No. Pin Name
1 to 20 S12 to S31
21 to 24 COM0 to COM3
25 BIAS
26 to 28 VLC0 to VLC2
29 TUNER
30 TAPE
31 CD
32 TIMER STATUS
33 VSS
34 CD-RESET
35 SURROUND
36 PLL CL
37 PLL DI
38 TUNER SD
39 CLOCK
40 DATA
41 STEREO
42 CD CLOCK
43 RDS CLOCK
44 REMOTE
45 SYNCRO
46 MUTE
47 PLLCE
48 CE
49 SHRST
50 RDS DATA
51 PSW
52 BASS BOOST
53 DPSW2/SLEND
54 VDD
55 XT1
56 XT2
57 IC
58 X1
59 X2
60 PLLDO SELECT
61 CD DATA
62 NC
63 12/24H SELECT
64 to 67 KEY R0 to KEY R4
68 CPU RESET
69 to 80 S0 to S11
SYSTEM CONTROLLER, LIQUID CRYSTAL DISPLAY DRIVER (DISPLAY BOARD)
I/O
O Segment drive signal output to the liquid crystal display (LD621)
O Common drive signal output to the liquid crystal display (LD621)
O Bias output for the liquid crystal display drive
I Input terminal for doubler circuit capacitor connection to develop liquid crystal display drive voltage
O Power on/off control signal output for the tuner section "L ":power on
O Audio line muting on/off control signal output "L ":muting on
O Power on/off control signal output for the CD section "L ":power on
O LED drive signal output of the TIMER indicator (D619)"L ":LED on
— Ground terminal
O Reset signal output to the CD section "L ":reset
O Not used (pull up)
O PLL serial data transfer clock signal output to the FM/AM PLL (IC102)
O PLL serial data output to the FM/AM PLL (IC102)
I FM and AM signal meter voltage detection input from the LA1823 (IC101)
O Serial data transfer clock signal output to the LC75392 (IC203)
O Serial data output to the LC75392 (IC203)
I FM stereo detection signal input from the LA1823 (IC101)"L ":stereo
I Serial data transfer clock signal input from the CD section
I Serial data transfer clock signal input from the RDS decoder (IC604) (not used)
I Remote control signal input from the remote control receiver (RM601)
I Recording on detection signal input
O Audio line muting on/off control signal output "H ":muting on
O PLL chip enable signal output to the FM/AM PLL (IC102)"H " active
O Chip enable signal output to the LC75392 (IC203)"H " active
O Not used (open)
I Serial data input from the RDS decoder (IC604) (not used)
O System power on/off control signal out "H ":power on
O Mega bass on/off selection signal output "H ":mega bass on
I CD lid open/close detection switch (SW600)input terminal "L ":CD lid is closed
— Power supply terminal
I Power failure detection input terminal "L ":power failure,"H ":power on
O Not used (open)
— Internal connection terminal (connected to power supply)
I Main system clock input terminal (6 MHz)
O Main system clock output terminal (6 MHz)
I PLL serial data input from the FM/AM PLL (IC102)
I/O Two-way data bus with the CD section
— Not used (open)
I Not used (fixed at "H ")
I Key return signal input from the key matrix "L " input when key pressing
System reset signal input from the reset signal generator (IC603)"L ":reset
I
For several hundreds msec.after the power supply rises,"L " is input,then it changes to "H "
O Segment drive signal output to the liquid crystal display (LD621)
Description
HCD-EP303
31