Hardware Reference Manual
Version 1.0
- 57 -
eInfochips Confidential
Figure 22 – IO Card HDMI to CSI Audio Connector (J23)
Pin specifications for J23 is mentioned below,
Pin Number
Net Name
J23.1
VCC_3V3_C_HDMI
3.3V Supply
J23.2
NC
Not Connected
J23.3
VCC_5V_C_HDMI
5V Supply
J23.4
NC
Not Connected
J23.5
HDMI_1.8V_DSI
1.8V Supply
J23.6
NC
Not Connected
J23.7
GND
Ground
J23.8
GND
Ground
J23.9
LNBBCLK3_HDMI
CLK-3
J23.10
HDMI_MI2S_3_SCK
HDMI I2S 3 I2S Clock
J23.11
HDMI_HPD_N
HDMI Hot plug detection
J23.12
HDMI_MI2S_3_WS
HDMI I2S 3 Word Sync Clock
J23.13
GPIO_110_HDMI_INT_GPIO
HDMI Interrupt
J23.14
HDMI_MI2S_3_D0
HDMI I2S 3 Data 0 Signal
J23.M1
GND
Ground
J23.M2
GND
Ground
Table 22: IO Card
HDMI Audio Connector (J23) Pinout
6.3.12
HDMI to CSI Audio interface
The Qualcomm SDA660 Processor does not include a built-in HDMI interface. The ERAGON660 has the
built-in MIPI-CSI 4 lanes interface, which is used, as HDMI input. A HDMI to CSI bridge chip TC358840
converts HDMI signals to MIPI CSI Signals. These CSI signals interfaced with SNAPDRAGON 660 through
MIPI CSI connectors mentioned in CSI section.
This Bridge Board supports audio as well. The ERAGON660 uses a MI2S_1 interface from the
SNAPDRAGON 660 chip which is mentioned in the below block. The ERAGON660 contains the 16 pin
HDMI Audio Connector (J13) on the board. A 6-wire (audio input) I2S channel is routed directly from
the SNAPDRAGON 660 SoC I2S interface pins to the HDMI to CSI Bridge Board through HDMI Audio
connector.
Summary of Contents for 17 00515 01
Page 1: ......
