STEVAL-CCH002V1 STMicroelectronics, STEVAL-CCH002V1 Datasheet - Page 13

• Manufacturer Part Number: STEVAL-CCH002V1
• Description: BOARD EVAL HDMI $ VIDEO SWITCH
• Manufacturer: STMicroelectronics

Specifications of STEVAL-CCH002V1

• Design Resources: STEVAL-CCH002V1 Gerber Files STEVAL-CCH002V1 Schematic STEVAL-CCH002V1 Bill of Material
• Main Purpose: Video, HDMI and Video Switches
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: STMAV335, STMAV340, STHDMI002A, STDVE003A
• Primary Attributes: DVI-I, 2 HDMI, Y Pb Pr, S-Video, CVBS, VGA - Input and Output
• Secondary Attributes: LCD Displays Selection Status of Video Switches and Buffers
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-8371

STDVE003A
3.2.1
3.3
3.4
SEL operating modes
The active source is selected by configuring source select inputs, S1, S2 and S3. The
selected TMDS inputs from each port are switched through a 3-to-1 multiplexer. The I
interface of the selected input port is linked to the I
hot plug detector (HPD) of the selected input port is output to HPD_SINK. For the unused
ports, the I
Table 5.
H: logic high; L: logic low; X: don't care; Z: high impedance
HPD pins
The input pin HPD_SINK is 5 V tolerant, allowing direct connection to 5 V signals. The
switch is able to pass both 0 V and 5 V signal levels. The HPD_SINK is an input pin while
the A_HPD, B_HPD and C_HPD are open-drain outputs.
DDC channels
The DDC channels are designed with a bidirectional NMOS gate, providing 5 V signal
tolerance. The 5 V tolerance allows direct connection to a standard I
the need for a level shifter. There should be external pull-up resistors on either side of the
device on both the SCL and SDA lines.
S1
H
L
L
L
Control pins
2
C interfaces are isolated, and the HPD pins are kept low.
SEL operating modes
S2
X
H
L
L
S3
H
X
X
L
A1/B1
A2/B2
A3/B3
None
Y/Z
(Z)
I/O selected
SDA_SINK
SCL_SINK
None (Z)
SDA1
SDA2
SDA3
SCL1
SCL2
SCL3
2
C interface of the output port, and the
HPD_SINK
HPD1
L
L
L
Hot-plug detect status
Functional description
HPD_SINK
2
C bus, thus eliminating
HPD2
L
L
L
HPD_SINK
HPD3
L
L
L
2
C
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