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K2G SoC
Buffer
SW15
OE#
MCASP2_AXR [2:3]
MCASP2_AFSX
MCASP2_ACLKX
HPROUT
HPLOUT
LINE1R
LINE1L
Copyright © 2016, Texas Instruments Incorporated
AUDIO
CODEC
TLV320AIC
K2G
SoC
TOUCH
Connector
I2C1_SDA
I2C1_SCL
TOUCH_INTR
RST
Copyright © 2016, Texas Instruments Incorporated
System Description
33
SPRUI65A – April 2016 – Revised January 2018
Copyright © 2016–2018, Texas Instruments Incorporated
K2G General Purpose Evaluation Module (EVMK2G)
Table 8. HDMI Audio Line Selection Between McASP0 and McASP2
Signal
Logic
Result
DC_BRD_DET
Low
McASP2 is connected to HDMI Transmitter SiI9022A.
High
McASP0 is connected to HDMI Transmitter SiI9022A.
3.17 Touch Connector
NOTE:
The EVMK2G does not come with an LCD Touchscreen display, it should be purchased
separately.
The Touch Connector interface is shown in
.
Figure 22. Touch Interface Block Diagram
3.18 Audio Codec
The Audio Codec TLV320AIC3106IRGZT is interfaced to the McASP2 port of the processor as shown in
. The ACLKX and FSX lines of McASP2 are shared between the Audio Codec, COM8, and the
HDMI transmitter. Hence, a buffer with OE# is connected as shown in
for muxing. Switch SW15
is turned ON for connecting the McASP2 to the Audio Codec. Audio Line In and Line Out are provided
through 3.5mm audio jacks (J32 and J33).
Figure 23. Audio Codec Interface Block Diagram
Table 9. Audio Codec Multiplexing
Signal
Switch
Output
AUD_BUFF_EN
SW15 is ON
SOC_McASP2 signals are going to Audio Codec and HDMI transmitter.
COM8_BUFF_EN
SW11 is ON
COM8 signals are connected to SOC_McASP2.