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AD9398
Rev. 0 | Page 7 of 44
Pin Type
Pin No.
Mnemonic
Function
Value
POWER SUPPLY
80, 76, 72, 67, 45, 33
VD
Analog Power Supply and DVI Terminators
3.3 V
100, 90, 10
VDD
Output Power Supply
1.8 V to 3.3 V
59, 56, 54
PVDD
PLL Power Supply
1.8 V
48, 32, 30
DVDD
Digital Logic Power Supply
1.8 V
GND
Ground
0 V
CONTROL
83
SDA
Serial Port Data I/O
3.3 V CMOS
82
SCL
Serial Port Data Clock
3.3 V CMOS
HDCP
49
DDCSCL
HDCP Slave Serial Port Data Clock
3.3 V CMOS
50
DDCSDA
HDCP Slave Serial Port Data I/O
3.3 V CMOS
51
MCL
HDCP Master Serial Port Data Clock
3.3 V CMOS
52
MDA
HDCP Master Serial Port Data I/O
3.3 V CMOS
AUDIO DATA OUTPUTS
28
S/PDIF
S/PDIF Digital Audio Output
VDD
27
I2S0
I2S Audio (Channel 1, Channel 2)
VDD
26
I2S1
I2S Audio (Channel 3, Channel 4)
VDD
25
I2S2
I2S Audio (Channel 5, Channel 6)
VDD
24
I2S3
I2S Audio (Channel 7, Channel 8)
VDD
20
MCLKIN
External Reference Audio Clock In
VDD
21
MCLKOUT
Audio Master Clock Output
VDD
22
SCLK
Audio Serial Clock Output
VDD
23
LRCLK
Data Output Clock for Left and Right Audio Channels
VDD
DATA ENABLE
88
DE
Data Enable
3.3 V CMOS
RTERM
46
RTERM
Sets Internal Termination Resistance
500 Ω
Table 6. Pin Function Descriptions
Mnemonic
Description
INPUTS
Rx0+
Digital Input Channel 0 True.
Rx0
Digital Input Channel 0 Complement.
Rx1+
Digital Input Channel 1 True.
Rx1
Digital Input Channel 1 Complement.
Rx2+
Digital Input Channel 2 True.
Rx2
Digital input Channel 2 Complement.
These six pins receive three pairs of transition minimized differential signaling (TMDS) pixel data (at 10× the pixel
rate) from a digital graphics transmitter.
RxC+
Digital Data Clock True.
RxC
Digital Data Clock Complement.
This clock pair receives a TMDS clock at 1× pixel data rate.
FILT
External Filter Connection.
For proper operation, the audio-clock generator PLL requires an external filter. Connect the filter shown in
Figure 8to this pin. For optimal performance, minimize noise and parasitics on this node. For more information see the
PWRDN
Power-Down Control/Three-State Control.
The function of this pin is programmable via Register 0x26 [2:1].
OUTPUTS
HSOUT
Horizontal Sync Output.
A reconstructed and phase-aligned version of the HSYNC input. Both the polarity and duration of this output can
be programmed via serial bus registers. By maintaining alignment with DATACK and DATA, data timing with
respect to horizontal sync can always be determined.
VSOUT
Vertical Sync Output.
The separated VSYNC from a composite signal or a direct pass through of the VSYNC signal. The polarity of this
output can be controlled via the serial bus bit (Register 0x24 [6]).
O/E FIELD
Odd/Even Field Bit for Interlaced Video. This output identifies whether the current field (in an interlaced signal) is
odd or even. The polarity of this signal is programmable via Register 0x24[4].
DE
Data Enable that defines valid video. Can be received in the signal or generated by the AD9398.