Codec-to-Platform
2-3
Digital Interface
Table 2
−
1. Pinout for 40-Pin Connector (Continued)
Pin Number
Signal
Description
J21.33
3.3V_A_DRV
Output driver supply 3.3 V
J21.34
AGND
Analog ground
J21.35
3.3V_A_DRV
Output driver supply 3.3 V
J21.36
AGND
Analog ground
J21.37
3.3V_A
Analog 3.3 V
J21.38
AGND
Analog ground
J21.39
3.3V_A
Analog 3.3 V
J21.40
AGND
Analog ground
The development platform supports a number of functions that the codecs
require. These are:
-
MCLK generation
-
Manual reset generation
-
Power options
Refer to the
DSP
−
Codec Development Platform User’s Guide
(TI Literature
Number SLAU090) for details regarding the development platform.
Further descriptions regarding the operation of this EVM assumes that the
development platform is being used for all additional signals and power.