Sundance SMT321 - Manual (Page 12)

Finally the two clock synthesizers are driven by external 16MHz crystal oscillators.
These are the only blocks needing clocks to operate.
2.5 Power Supply and Reset Structure
The SMT321 conforms to the TIM standard for single width modules. The TIM
connectors supply the module with 5.0V. The module also requires an additional 3.3V
power supply, which must be provided by the two diagonally opposite mounting holes.
This 3.3V is present on all Sundance TIM carrier boards. From the 5.0V the FPGA Core
Voltage (V
CCINT
= 1.2V) and the FPGA Auxiliary voltage (V
CCAUX
= 2.5V) is generated.
The FPGA IO Voltage (V
CCO
= 3.3V) is taken straight from the TIM mounting holes.
A TI MSP430 low power microprocessor is located on the module. This microprocessor
controls the power sequencing for the FPGA. High efficiency DC/DC converters are
used to generate the lower voltages.
The MSP430 microprocessor also controls the reset structure for the SMT321. There are
two possible reset sources for the SMT321:
1. A reset is received over the TIM connector
2. After power up an internal POR in the MSP430 causes a reset
The MSP430 distributes the reset to the FPGA. The following two diagrams illustrate the
power distribution and the reset distribution on the SMT321: