Adi_Ebiu_Timing_Value - Analog Devices VisualDSP++ 5.0 Service Manual

Public Data Types and Enumerations
where
ADI_EBIU_TIMING_UNIT
ADI_EBIU_TIMING_UNIT_MILLISEC
ADI_EBIU_TIMING_UNIT_MICROSEC
ADI_EBIU_TIMING_UNIT_NANOSEC
ADI_EBIU_TIMING_UNIT_PICOSEC
ADI_EBIU_TIMING_UNIT_FEMTOSEC
The actual values of the enumeration fields are used as factors in the inte-
ger arithmetic within the module. The millisecond value, which is used as
a logic control value, is an exception, since it is not used as a factor.
Developers can use the complete range of units to enable timing values to
be expressed as an unsigned 32-bit integer. For example, the SDRAM on
the ADSP-BF533 EZ-KIT Lite board has a minimum
cycle and 7.5 ns. The time value must be passed as 7500 ps. Thus,
SCLK
the
ADI_EBIU_TIME
ADI_EBIU_TIME time = {7500, ADI_EBIU_TIMING_UNIT_PICOSEC};

ADI_EBIU_TIMING_VALUE

Certain timing values required to correctly set the SDRAM control
registers are specified on the appropriate processor's data sheet as a
number of
SCLK
units (for example, nanoseconds or milliseconds).
4-28
is an enumeration type defined as follows.
Time value specified by the associated value in the
ADI_EBIU_TIME
Time value specified by the associated value in the
ADI_EBIU_TIME
Time value specified by the associated value in the
ADI_EBIU_TIME
Time value specified by the associated value in the
ADI_EBIU_TIME
Time value specified by the associated value in the
ADI_EBIU_TIME
value must be specified as:
cycles combined with a value expressed in one of several
VisualDSP++ 5.0 Device Drivers and System
Services Manual for Blackfin Processors
structure is in milliseconds (ms)
structure is in microseconds (ms)
structure is in nanoseconds (ns)
structure is in picoseconds (ps)
structure is in femtoseconds (fs)
value of one
TWR