31
Pin No.
Pin Name
I/O
Description
80
SO1
O
Serial data output to the audio DSP (IC501), DSD decoder (IC901) and D/A converter
(IC902, IC905 to 907)
81
SI2
I
RS-232C data input terminal (for debug)
82
SO2
O
RS-232C data output terminal (for debug)
83
XRST
O
Reset signal output to the gate array (IC601)
84
DACK1
O
Acknowledge signal output to the AV decoder (IC401)
85
DACK0
O
Acknowledge signal output to the AV decoder (IC401)
86
DREQ1
I
DMA request signal input from AV decoder (IC401)
87
DREQ0
I
DMA request signal input from AV decoder (IC401)
88
INT3
I
Interrupt request signal input from the gate array (IC601)
89
SC1
O
Serial data transfer clock signal output to the audio DSP (IC501), DSD decoder (IC901) and
D/A converter (IC902, IC905 to 907)
90
GND
—
Ground terminal
91
X1
O
System clock output terminal (12.5MHz)
92
X0
I
System clock input terminal (12.5MHz)
93
VCC5
—
Power supply terminal (+3.3V)
94
INT1
I
Interrupt request signal input from the gate array (IC601)
95
INT0
I
Interrupt request signal input from the AV decoder (IC401)
96
XIFOK
I
Acknowledge signal input from the IF controller (IC1)
97
XIFCS
O
Chip select signal output to the IF controller (IC1)
98
XDACS0
O
Chip select signal output to the D/A converter (IC902)
99
XDACS1
O
Chip select signal output to the D/A converter (IC905)
100
DVD/CD
O
Sampling frequency selection signal output to the PLL IC (IC001)
“L”: 48kHz, “H”: 44.1kHz
Summary of Contents for HCD-ZX70DVD
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