2.1
Input/Output Connector Descriptions
2.1.1
J1 – USB Input Connector
2.1.2
J2 – ZigBee™ Input Connector
2.1.3
J3 – RS-232 Input Connector
2.1.4
J4 – DSP Board Connector
2.1.5
J5 – JTAG Input Connector
2.1.6
J6 – VIN
2.1.7
J7 – GND Connector
2.1.8
J8 – Input Power Connector
Setup
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This mini-USB connector connects the EVM directly to the host PC’s USB port.
This connector mates to the HPA358 LED board. The customer also can connect a custom board to this
connector with a 30-pin ribbon cable. To minimize stray inductance and ringing on the output traces, make
connections to this connector as short as possible. This connector allows the user to connect ZigBee
devices such as the eZ430-RF2500. The user can write customized code to control the TLC5944EVM with
a wireless ZigBee connection. J2 is not populated or used with the supplied EVM software.
This connector allows the user to connect an RS-232 device. The user can write customized code to
control the TLC5944EVM or to modify the DSP board’s firmware. J3 is not populated or used with the
supplied EVM software.
The DSP board plugs into the J4 connector on the Driver board.
This connector can be used for JTAG communications to help debug user-generated software. J5 is not
populated or used with the supplied EVM software.
This is the positive input supply to the EVM. The input voltage must be between 5 V and 15 V for normal
operation with no multiplexing. When Row A and Row B are multiplexed by checking the Ghosting Demo
button in the software, the maximum operating voltage is 10 V. The 10-V maximum voltage is limited by
switching losses in the FETs on the LED board. The EVM can be operated with 15 V when multiplexing, if
forced air cooling is used on the LED board. To minimize power dissipation, the input voltage must be as
low as possible. The leads to the input supply must be twisted and kept as short as possible to minimize
EMI transmission.
This connector is the return for the input supply to the EVM. The leads to the input supply must be twisted
and kept as short as possible to minimize EMI transmission.
This is a right-angle miniature power jack with a 3,5-mm diameter connection. The user can use this
connector to supply input power to the EVM from an ac-to-dc plug-in adapter. The inner pin on the
connector is connected directly to J6 (Vin). The outer pin on the connector is connected directly to J8
(GND). When using an ac-to-dc plug-in adapter, ensure that the plug-in adapter’s output voltage is stable
and does not drop below 5 V when loaded.
TLC5944EVM-358
4
SLVU306 – April 2009
