6 Bitstream File Configuration
UG290-2.3E
82(87)
The bitstream file loading time in MSPI mode is as shown in Table 6-3.
Table 6-3 Loading Time in MSPI Mode
Number
of LUT4
Max.
Configuration
File
Loading Time
(ms, when
Frequency
=2.5 M z)
Loading Time
(ms, when
Frequency
=25 MHz)
Loading Time
(ms, when
Frequency
=41.6 MHz)
Loading Time
(ms, when
Frequency
=62.5 MHz)
1,152
84 KBytes
275
28
17
11
4,608
217 KBytes
711
71
42
28
8,640
435 KBytes
1425
142
85
57
20,736
887 KBytes
2906
290
174
116
54,720
2269 KBytes
7435
743
446
297
The bitstream file loading time in Autoboot mode is as shown in Table
Table 6-4 Loading Time in Autoboot Mode
Number
of LUT4
Max.
Configuration
File
Loading Time (ms,
when frequency
=2.5 MHz, default
frequency)
Loading Time (ms,
when Frequency
=25 MHz)
Loading Time (ms,
when Frequency
=31.25 MHz)
1,152
84 KBytes
34
4
3
4,608
217 KBytes
88
9
7
8,640
435 KBytes
178
17
14
What is listed above is the reference of loading time. From power on to
configuration completion of the device, in addition to the configuration time,
there are also the power on time (Tramp) and initialization time of the
device. The specific power on time is related to the power supply device.
Therefore, the approximate time of FPGA from power on to loading
completion can be calculated according to the following formula:
Autoboot mode:
T
loading time
= POR time + Number of Data Stream Bits /8/ Clock Cycle
MSPI mode:
T
loading time
= POR time + Number of Data Stream Bits /clock cycle
T
loading time
= POR time + Number of Data Stream Bits /clock cycle