Chapter 4: Configuration
R
SelectMAP Clock Selection
The default configuration of the ML555 board is to provide Master SelectMAP
configuration with the FPGA providing the configuration clock (CCLK) to both the FPGA
and Platform Flash devices. Slave SelectMAP configuration is not supported on the
ML555.
Table 4-1 shows the Virtex-5 FPGA configuration mode along with the correct setting for
the Mode Switch SW5. Table 4-7 shows the P2 connections for the CCLK source.
Table 4-7:
SelectMAP Clock Mode
Mode
Master SelectMAP
Function
FPGA CCLK drives Platform Flash CLKIN (1)
Header P2 Jumper
Settings
1-2
Notes:
1. Xilinx recommends using an FPGA configuration clock frequency of 20 MHz rather than the default
2 MHz CCLK used by the BitGen application. Refer to “Platform Flash Image Generation and
Programming,” page 101 for a BitGen example.
Figure 4-8 shows the clock structure for SelectMAP mode along with Header (P2).
U1/U15 Fl as h
CLKIN
P2 He a der
U10 FPGA
1
2
CLKOUT
3
5
4
6
CCLK
GC
Y2 30 MHz
O s cill a tor
U4 Clock B u ffer
U6 CPLD
I/O/GC1
M as ter S electMAP (def au lt)
UG201_c4_0 8 _02260 8
Figure 4-8: SelectMAP Clock Circuitry
100
Virtex-5 FPGA ML555 Development Kit
UG201 (v1.4) March 10, 2008
相关PDF资料
HW-V5-ML561-UNI-G EVALUATION PLATFORM VIRTEX-5
I-JET JTAG ARM DEBUGGING PROBE
IAC24A INPUT MODULE AC 5MA 24VDC
IAC5EQ INPUT MODULE AC 10MA 5VDC
IB8RM SURGE SUPP 8OUT 12'CORD W/REMOTE
IBAR12-20T SURGE SUPPRSSR 20A 12OUT RACKMNT
IBAR12/20ULTRA SURGE SUPPRSSR 20A 12OUT RACKMNT
IBAR12ULTRA SURGE SUPPRSSR 15A 12OUT RACKMNT
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