PSD4235G2 Datasheet, PDF (65/89 Pages) STMicroelectronics – Flash In-System Programmable ISP Peripherals For 16-bit MCUs 5V Supply

PSD4235G2
AC/DC PARAMETERS
These tables describe the AD and DC parameters
of the PSD4235G2:
t DC Electrical Specification
t AC Timing Specification
s PLD Timing
– Combinatorial Timing
– Synchronous Clock Mode
– Asynchronous Clock Mode
– Input Macrocell Timing
s MCU Timing
– Read Timing
– Write Timing
– Peripheral Mode Timing
– Power-down and Reset Timing
The following are issues concerning the parame-
ters presented:
s 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.
s The AC power component gives the PLD, Flash
memory, and SRAM mA/MHz specification.
Figure 35 show the PLD mA/MHz as a function
of the number of Product Terms (PT) used.
s In the PLD timing parameters, add the required
delay when Turbo bit is 0.
Figure 35. PLD I_CC /Frequency Consumption
110
100
Vcc = 5V
90
80
TURBO ON (100%)
70
60
TURBO OFF
50
TURBO ON (25%)
40
30
20
PT 100%
PT 25%
TURBO OFF
10
0
0
5
10
15
20
25
HIGHEST COMPOSITE FREQUENCY AT PLD INPUTS (MHz)
AI05739
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