Answers Database
XPLA2: Length of time for configuration or download.
Record #7662
Product Family: Hardware
Product Line: R3000
Product Part: R3320
Product Version: XPLA2
Problem Title:
XPLA2: Length of time for configuration or download.
Problem Description:
Urgency: Standard
General Description: How long will the XPLA2 configuration or
download take?
Solution 1:
This answer varies with configuration modes and file sizes. Worst-case
configuration timing can be estimated using the maximum configuration
file size and the slowest CCLK frequency in master serial mode. For both
devices, the slowest CCLK frequency is 0.6MHZ with a period of 1.67uS.
Each bit takes 1.67uS to download, therefore for the XCR320, the worst
case download time is (1.67uS)*189,280 = 315mS. For the XCR960, the
worst case download time is (1.67uS)*565,600 = 943mS.
The same calculations can be used for master parallel, however, the
download time will be 8X faster since 8 bits of data are transferred on
each clock instead of just one.
When the XPLA2 devices are in slave modes, the frequency of the
supplied CCLK should be used in determining download times.
End of Record #7662 - Last Modified: 10/08/99 13:12 |
