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56 www.xilinx.com ML605 Hardware User Guide
UG534 (v1.2.1) January 21, 2010
Chapter 1: ML605 Evaluation Board
Mode, Osc Enable, Boot EEPROM Select, and Addr Select DIP Switch S2
DIP switch S2 is a multi-purpose selector switch (Figure 1-27 and Table 1-27, page 57).
FPGA Mode: S2 switches 3, 4, and 5 control the FPGA mode (Table 1-26).
Oscillator Enable: S2 switch 1, CCLK_EXTERNAL, controls the enable pin of the 47 MHz
oscillator SiT8102 (X4). When switch 1 is closed (CCLK_EXTERNAL High), X4 drives a
47 MHz clock onto the FPGA_CCLK signal.
Boot EEPROM Select: S2 switch 2 is used to select the between the Xilinx Platform Flash or
the Numonyx Linear BPI Flash for the FPGA boot memory device.
Upper or Lower Address Select: S2 switch 6 is used to select the upper or lower half of
flash memory U4 as the source of the FPGA bitstream image. When FLASH_A23 is High,
the upper half of the address is selected. When FLASH_A23 is Low, the lower half of the
address is selected.
Table 1-26 shows the FPGA configuration modes controlled by S2 switches 3, 4, and 5.
X-Ref Target - Figure 1-27
Figure 1-27: Multi-Purpose Select DIP Switch S2
Table 1-26: ML605 Configuration Modes
Configuration Mode M[2:0] Bus Width CCLK
Master BPI-Up 010 8, 16 Output
JTAG 101 1 Input (TCK)
Slave SelectMAP 110 8, 16, 32 Input
UG534_27_110409
SDMX-6-X
4
5
6
123 4
56
9
8
7
1
2
3
12
11
10
S2
ON
VCC2V5
1
2
5%
1/16W
510
R57
1/16W
5%
1
2
5%
1/16W
510
R52
2
1
R51
510
1/16W
5%
CCLK EXTERNAL
P30_CS_SEL
FPGA_M0
FPGA_M1
FPGA_M2
FLASH_A23
1
2
1
2
1
2
1
2
1
2
1
2
1/16w
5%
1/16w
5%
1/16w
5%
1/16w
5%
1/16w
5%
1/16w
5%
R43
R50
R53
R54
R55
R56
4.7K
4.7K
4.7K
4.7K
4.7K
4.7K