ICD-47 - Sony Audio Service Manual (repair manual). Page 14

14

Pin No.

Pin Name

I/O

Description

72

DSPSI

I

Recording serial data input from the digital signal processor (IC104)    “H” active

73

DSPSO

O

Playback serial data output to the digital signal processor (IC104)    “H” active

74

DSPSCK

O

Serial clock signal output to the digital signal processor (IC104)    “H” active

75

RTCDI

I

Serial data input from the real time clock (IC703)    “H” active

76

RTCDO

O

Serial data output to the real time clock (IC703)    “H” active

77

RTCCLK

O

Serial data transfer clock signal output to the real time clock (IC703)    “H” active

78

IC

—

Internal connection terminal (connected to ground)

79

X2

O

Main system clock output terminal (5 MHz)

80

X1

I

Main system clock input terminal (5 MHz)

81

VDD1

—

Power supply terminal (+3.3V)

82

XT1

I

Sub system clock input terminal (32.768 kHz)

83

XT2

O

Sub system clock output terminal (32.768 kHz)    Not used (open)

84

XRESET

I

System reset signal input from the reset signal generator (IC505)    “L”: reset
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”

85

DSPFRM

I

Interrupt input terminal of frame signal from the digital signal processor (IC104)    “H” active

86

WAKEUP

I

Key interruption processing start signal input terminal    “H” active

87

RTCINT

I

Interrupt input from the real time clock (IC703) (2 Hz)    “H” active

88

DSPRDY

I

Interrupt input terminal of ready/busy detection signal from the digital signal processor (IC104)    
“L”: ready, “H”: busy

89

DSPDAV

I

Available data input from the digital signal processor (IC104)    “H” active 

90

AVREF

O

Reference voltage output terminal (for A/D converter)    “H” active

91 to 98 FMIO0 to FMIO7

I/O

Two-way data bus with the flash memory (IC702) (bit 0 to bit 7)    “H” active

99

AVSS

—

Ground terminal (for A/D converter)

100

BATT

I

Dry battery voltage detection signal input terminal (A/D input)