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Synchronization Systems: The Q2 is provided with a TV sync function in addition to master
mode to simplify synchronization with an external device.
The TVM (TV sync mode) bits in the display register (DSMR) are used to select master mode or
TV sync mode.
• Internal Synchronization Mode (Master Mode)
Setting the horizontal and vertical sync signal (HSYNC and VSYNC) cycles and pulse widths
in the display control register outputs the corresponding waveforms, and display data is output
in synchronization with these signals.
In interlace sync mode and interlace sync & video mode, a signal indicating odd field or even
field is output at the ODDF pin.
• External Synchronization Mode (TV Sync Mode)
In TV sync mode, display data is output in synchronization with vertical and horizontal sync
signals (EXHSYNC and EXVSYNC) input from an external source. The Q2 outputs display
data on the basis of the fall of the EXHSYNC signal and the rise of the EXVSYNC signal.
In this mode, the horizontal sync signal, vertical sync signal, and clock from the sync signal
generator should be input at the EXHSYNC, EXVSYNC, and CLK1 pins, respectively.
Signals that do not contain equivalent pulses should be used for the sync signals.
In interlace sync mode and interlace sync & video mode, a signal indicating odd field or even
field should be input at the ODDF pin.
In non-interlace mode, the ODDF pin should be fixed high or low to prevent an unstable input
level at this pin.
The Q2 performs UGM refreshing based on EXHSYNC and EXVSYNC. If EXHSYNC and
EXVSYNC are not input, UGM refreshing will not be carried out.
The signal flow in TV sync mode is shown in figure 3-16.
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