AC/DC parameters
22 AC/DC parameters
PSD8XXFX
This section summarizes the operating and measurement conditions, and the DC and AC
characteristics of the device:
● DC electrical specifications
● AC timing specifications
– PLD timings
Combinatorial timings
Synchronous clock mode
Asynchronous clock mode
Input macrocell timings
– MCU timings
READ timings
WRITE timings
Peripheral mode timings
Power-down and Reset timings
The parameters in the DC and AC Characteristic tables that follow are derived from tests
performed under the Measurement Conditions summarized in the relevant tables. Designers
should check that the operating conditions in their circuit match the measurement conditions
when relying on the quoted parameters.
The following are issues concerning the parameters presented:
● In the DC specification the supply current is given for different modes of operation.
Before calculating the total power consumption, determine the percentage of time that
the PSD is in each mode. Also, the supply power is considerably different if the Turbo
Bit is ’0.’
● The AC power component gives the PLD, Flash memory, and SRAM mA/MHz
specification. Figure 34 and Figure 35 show the PLD mA/MHz as a function of the
number of Product Terms (PT) used.
● In the PLD timing parameters, add the required delay when Turbo Bit is ’0.’
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Doc ID 7833 Rev 7