Additional Design Details; Shared Spi Bus With Peripherals - Xilinx MIcroBlaze Development Spartan-3E 1600E Kit User Manual

R
After programming the SPI Flash, remove jumper JP8, as shown in
properly programmed, the FPGA then configures itself from the SPI Flash PROM and the
DONE LED lights. The DONE LED is shown in

Additional Design Details

Figure 12-18
Starter Kit board. In most applications, this interface is as simple as that shown in
Figure 12-1, page
configuration options and demonstrates additional Spartan-3E capabilities.

Shared SPI Bus with Peripherals

After configuration, the SPI Flash configuration pins are available to the application. On
the Spartan-3E Starter Kit board, the SPI bus is shared by other SPI-capable peripheral
devices, as shown in
FPGA application must disable the other devices on the shared SPI bus.
the signal names and disable values for the other devices.
Table 12-3: Disable Other Devices on SPI Bus
MicroBlaze Development Kit Spartan-3E 1600 Edition User Guide
UG257 (v1.1) December 5, 2007
provides additional details of the SPI Flash interface used on the Spartan-3E
91. The Spartan-3E Starter Kit board, however, supports of variety of
Spartan-3E FPGA
MOSI/CSI_B
SF_A<17>
(T16) VS2/A17
SF_A<18>
(U15) VS1/A18
SF_A<19>
VS0/A19
(V15)
Figure 12-18: Additional SPI Flash Interface Design Details
Figure
Signal
DAC_CS Digital-to-Analog Converter (DAC)
AMP_CS Programmable Pre-Amplifier
Figure 12-3, page
SPI_MOSI
(T4)
SPI_MISO
DIN/D0
(N10)
SPI_SCK
CCLK (U16)
SPI_SS_B
CSO_B (U3)
SPI_ALT_CS_JP11
User-I/O (R12)
Jumper J11
Programming
Header J12
12-18. To access the SPI Flash memory after configuration, the
Disabled Device
Additional Design Details
Figure 12-16(a). If
92.
3.3V
STMicro M25P16
SPI Serial Flash
D
Q
C W
S HLD
DAC
AMP
ADC
Platform
Flash
Strata-
Flash
UG257_12_18_060806
Table 12-3 shows
Disable Value
1
1
101
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