Demo Board Connections
Table 1-9. GPIO/Audio Interface
Designator
Signal
Description
J21.18
SDIN/GPIO0
Aux I2S Data Input / Remote or Local I/O
J21.20
SWC/GPIO1
Aux I2S Word Clock Output / Remote or Local I/O
J21.2
I2S_DC/GPIO2
I2S Data Input / Remote or Local I/O
J21.4
I2S_DD/GPIO3
I2S Data Input / Remote or Local I/O
J21.6
VDDIO
GPIO Voltage Level 1.8V
I2S_DB/GPIO5_RE
J21.8
I2S Data Input / Local only I/O
G
I2S_DA/GPIO6_RE
J21.10
I2S Data Input / Local only I/O
G
I2S_WC/GPIO7_RE
J21.12
I2S Word Clock Input / Local only I/O
G
I2S_CLK/GPIO8_RE
J21.14
I2S Clock Input / Local only I/O
G
J21.24
MCLK
I2S System Clock Output
Configuration of the device may be done via the MODE_SEL[1:0]. These modes are latched into register
location during power-up:
Table 1-10. MODE_SEL[1:0] Settings
Mode
Setting
Function
Look for remote EDID, if none found, use internal SRAM EDID. Can be
0
overridden from register. Remote EDID address may be overridden from
EDID_SEL: Display ID Select
default 0xA0.
1
Use external local EDID.
0
Disable.
AUTO-SS: Auto Sleep-State
1
Enable.
0
HDMI audio.
AUX_I2S: AUX Audio
Channel
1
HDMI + AUX audio channel.
0
Internal HDCP/HDMI control.
EXT_CTL: External Controller
Override
1
External HDCP/HDMI control from I2C interface pins.
0
Enable FPD-Link III for twisted pair cabling.
COAX: Cable Type
1
Enable FPD-Link III for coaxial cabling.
0
Use internal SRAM EDID.
REM_EDID_LOAD: Remote
EDID Load
1
If available, remote EDID is copied into internal SRAM EDID.
Table 1-11. Configuration Select (MODE_SEL0) - SW-DIP8 - S2
(1)
MODE #
EDID_SEL
AUTO_SS
AUX_I2S
1
0
0
0
2
0
0
1
3
0
1
0
4
0
1
1
5
1
0
0
6
1
0
1
7
1
1
0
8
1
1
1
(1)
Only set one high.
11
SNLU172 – January 2015
DS90Ux929EVM User's Guide
Copyright © 2015, Texas Instruments Incorporated
