A transmit clock generator includes a first local clock generator and a
second local clock generator, each receiving an external PLL clock signal
and respectively generating first and second divided clock signals. A
synchronization signal is applied to the first local clock generator and
second local clock generator during a clock training period to enforce a
phase relationship between the first and second divided clock signals.
The synchronization signal includes at least one synchronization pulse
that is applied to the first local clock generator and second local clock
generator during the clock training period.