Datasheet

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4 Power Supplies
4.1 Stand-Alone Operation
Power Supplies
Table 3. Digital Interface Pin Out (continued)
PIN NUMBER SIGNAL DESCRIPTION
J5.5 NC Not Connected
J5.6 NC Not Connected
J5.7 WCLK Audio Serial Data Bus Word Clock (Input/Output)
J5.8 NC Not Connected
J5.9 NC Not Connected
J5.10 DGND Digital Ground
J5.11 DIN Audio Serial Data Bus Data Input (Input)
J5.12 NC Not Connected
J5.13 DOUT Audio Serial Data Bus Data Output (Output)
J5.14 NC Not Connected
J5.15 NC Not Connected
J5.16 SCL I2C Serial Clock
J5.17 MCLK Master Clock Input
J5.18 DGND Digital Ground
J5.19 NC Not Connected
J5.20 SDA I
2
C Serial Data Input/Output
Note that J5 comprises the signals needed for an I
2
S™ serial digital audio interface; the control interface
( I
2
C™ and RESET) signals are routed to J4. I
2
C is actually routed to both connectors; however, the device
is connected only to J4.
J3 provides connection to the common power bus for the TLV320AIC31EVM. Power is supplied on the
pins listed in Table 4 .
Table 4. Power Supply Pin Out
SIGNAL PIN NUMBER SIGNAL
NC J3.1 J3.2 NC
+5VA J3.3 J3.4 NC
DGND J3.5 J3.6 AGND
DVDD (1.8V) J3.7 J3.8 NC
IOVDD (3.3V) J3.9 J3.10 NC
The TLV320AIC31EVM-PDK motherboard (the USB-MODEVM Interface board) supplies power to J3 of
the TLV320AIC31EVM. Power for the motherboard is supplied either through its USB connection or via
terminal blocks on that board.
When used as a stand-alone EVM, power can be applied to J3 directly, making sure to reference the
supplies to the appropriate grounds on that connector.
CAUTION
Verify that all power supplies are within the safe operating limits shown on
the TLV320AIC31 data sheet before applying power to the EVM.
SBAU115 – November 2005 TLV320AIC31EVM and TLV320AIC31EVM-PDK User's Guide 5