Sony MEX-1HD Service Manual page 94

MEX-1HD
Pin No. Pin Name
48 RC_IN0
49
FP_I_DET
50 QUALITY
51
TR_I_DET
52 MPTH
53
VSM
54 VCC
55 AMP_ON
56
NS MASK
57 DOOR_IND
58 XTROPEN_END
59
XTRCLOSE_END
60 TRAY_LED
61
TRAY_M+
62 TRAY_M–
63 VSS
64 NC
65 FSW_IN
66 NC
67 SH_WDT
68 XFAIL
69 XFLASH _W
70 I2CSIO
71 I2CCKO
72 KEYACK
73 X1A
74
X0A
75 XDAVN
76 XRTC_INT
77 BU IN
78 XPDOWN
79 RC_IN1
80 XADON
81 XACC_IN
82 FLS_ON
83 PW_ON
84 XTEST_IN
85 RAMBU
86 HSTX
87 to 89 MD2 to 0
90 XRST
91 VSS
94
I/O
I
Key input from the rotary commander (A/D input) Not used
I
Over load detection signal input from the front panel open/close motor driver
I
Noise level detection signal input terminal Not used
I
Over load detection signal input from the tray open/close motor driver
I Multi-path detection signal input terminal Not used
I FM and AM signal meter voltage detection input from the FM/AM tuner pack (A/D input)
— Power supply terminal (+5V)
O Power amplifier drive signal output terminal "L": standby, "H": amplifier on
O Noise detect port mask output terminal "H" active Not used
O
LED drive signal output terminal
I Detection input from the tray open-end detect switch "L": active
I
Detection input from the tray close-end detect switch "L": active
O
LED drive signal output terminal
O Motor drive signal output to the tray open/close motor driver "L": tray open
O Motor drive signal output to the tray open/close motor driver "L": tray close
— Ground terminal
— Not used
I
Oscillation frequency count terminal
— Not used
I Watch dog timer detection signal input terminal
I Rewriting failure detection terminal "L": rewriting failure
I
FLASH writing mode detection terminal "L": flash writing mode
I/O Two-way data bus with the FM/AM tuner pack and electrical volume
O
Serial data transfer clock signal output to the FM/AM tuner pack and electrical volume
Input of acknowledge signal for the key entry Acknowledge signal is input to source and eject
I
keys in the power off status On at input of "H"
O Sub system clock output terminal (32.768kHz) Not used
I Sub system clock input terminal (32.768kHz)
I
Data transmit completed detect signal input terminal Not used
I Alarm interrupt request signal input from the real time clock
I
Back up power supply detect signal input terminal "L" is input at low voltage
I Power down detection signal input from the voltage detect "L": power down, normally: "H"
I
Key input from the rotary commander (A/D input) Not used
A/D converter power control signal output When the KEYACK (pin us) that controls reference
O voltage power for key A/D conversion input is active, "L" is output from this terminal to enable
the input
I Accessory power supply detect signal input terminal "L": accessory on
O
Level shift on/off control of UART communication and watch dog timer signal line
O Audio system power supply on/off control signal output to the regulator "H": power on
I
For test terminal Normally fixed at "H"
Internal RAM reset detection signal input from the reset signal generator
I
Input terminal to check that RAM data are not destroyed due to low voltage
This checking is made within 100 msec after reset
I Hardware standby signal input terminal "L": hardware standby
I
Mode setting input terminal
I
System reset signal input from the reset signal generator "L": reset
— Ground terminal
Description