Specifications

MDR User Guide 103
is used to notify the software when a specified amount of data has been transferred to the
MIDAS DRAM.
SYNC
The SYNC* signal can be used to synchronize the DPIO input module installed on the
MDR system with the transmitter. It is used in ‘single frame data’ mode.
The SYNC* signal is asserted prior to the transmission of data by the data transmitter,
not at the same time as VALID*. This is to synchronize the receiver to the source.
SYNC* is ignored by the receiver after the first assertion.
To disable the use of the SYNC* signal, type the following command at the MIDAS
Monitor prompt:
# iset DpioInfo WaitForSync Disable mdr.ini
To enable the use of the SYNC* signal, type the following command at the MIDAS
Monitor prompt:
# iset DpioInfo WaitForSync Enable mdr.ini
FPDP Clocks
Two separate clocks are provided on the FPDP. STROB is a single-ended clock
confirming to TTL levels, while PSTROB and /PSTROB is a differential positive
Emitter-Coupled Logic (ECL) version of the same clock. Either of these signals may be
used. However, the PSTROB /PSTROB signal pair is preferable, especially at high
clocking frequencies and when driving longer lines, since the noise margin is improved
over the TLL clock.
To disable the use of the PSTROB /PSTROB signal pair, type the following command at
the MIDAS Monitor prompt:
# iset DpioInfo PeclStrobe Disable mdr.ini
To enable the use of the PSTROB /PSTROB signal pair, type the following command at
the MIDAS Monitor prompt:
# iset DpioInfo PeclStrobe Enable mdr.ini
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