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2 Hardware Configuration
2.1 Power
A DC barrel jack (J9) to accept a 5-V wall power adapter is provided on the EVM. The DC barrel jack (CUI Inc. ™
PJ-202AH) has an inner diameter of 2.1 mm and an outer diameter of 5.5 mm. The tip of the +5 V power supply
must be positive. A +5 V power supply of at least 1.5 amps that meets the above requirements can be used to
power the TMDS1204 EVM. Power is provided to the EVM when SW2 is set to position 1.
Alternatively, it is possible to power the EVM by connecting a USB Micro cable from a host to the J13 USB Micro
B connector and setting SW2 to position 3.
Note
Limit VBUS voltage and voltage from barrel jack to no more than 6 V.
2.2 Enable or Reset
There are three device enable or reset options to use with the EVM, and are as follows:
1. Supervisor circuitry option. This is the default configuration on the EVM. The enable (EN) signal is held low
until the power good (REG_PG) from the 3.3 V voltage regulator reaches a stable high voltage level then is
released high.
2. RC timing option. C26 external capacitor and internal resistor are used on control the EN pin ramp time after
the device is powered on. C26 is a DNI ( Do Not Install option) by default. C26 needs to be installed and R77
needs to be uninstalled to enable this option.
3. External control option. A push button (SW1) is provided to manual control the EN pin.
2.3 Configuration Jumpers
Multiple jumpers are provided on the EVM for configuration of TMDS1204 and also for probe points.
The following is a list of 4-level jumpers which are used to configure the TMDS1204: J33, JMP4, JMP5, JMP6,
JMP7, JMP8, JMP9, and JMP13.
Table 2-1 provides the jumper position to select between the different levels.
Note
4-level pins are sampled after the rising edge of the EN pin. Therefore, a change in any 4-level pin
state will not be applied until after the EN pin is toggled from low to high.
Table 2-1. 4-Level Configuration Jumper Settings
Jumper Position 4-Level State
Short 4 to 6 0
Short 3 to 4 R
Open F
Short 2 to 4 1
Table 2-2. Jumpers
Jumper Default Position Description
JMP4 Short 4 to 6 MODE.
Default is pin-strap mode. If I2C mode is desired, leave this jumper open or no-connect. Refer
to data sheet for more details.
JMP5 Short 2 to 4 CTLEMAP_SEL. Refer to data sheet for details on different CTLEMAP options.
JMP6 Open EQ1. In pin-strap mode, this jumper along with JMP8 (EQ0) will select the EQ value for the
receiver. The EQ may need to be tuned based on quality of HDMI cable used. Refer to data
sheet for details on EQ options.
JMP7 Open TXPRE. Refer to data sheet for details.
JMP8 Short 4 to 6 EQ0/ADDR. In pin-strap mode, this jumper along with JMP6 (EQ1) will select the EQ value for
the receiver. The EQ may need to be tuned based on quality of HDMI cable used. Refer to
data sheet for details.
JMP9 Open TXSWG. Refer to data sheet for details.
JMP13 Short 4 to 6 LINEAR_EN. Refer to data sheet for details.
Hardware Configuration www.ti.com
4 TMDS1204 EVM User's Guide SLLU341 – JULY 2022
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