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32 www.xilinx.com ML310 User Guide
1-800-255-7778 UG068 (v1.01) August 25, 2004
Chapter 2: ML310 Embedded Development Platform
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GPIO LED Interface
All LEDs connected to the GPIO lines illuminate Green when driven with a logic zero and
extinguish with a logic one. Table 2-6 shows the connections for the GPIO LEDs from the
FPGA to the non-inverting buffer (U36).
GPIO LCD Interface
The GPIO signals used to connect to the 16 pin LCD header (J13) are organized into two
types of I/O, output only and input/output. There are three output only signals and eight
input/output signals. The eight input/outputs are controlled by the logic level of the
FPGA_LCD_DIR signal. Driving FPGA_LCD_DIR to a logic one configures the LVCC3245
to drive the J13 connector while a logic zero configures the LVCC3245 to drive the
XC2VP30.
Table 2-7 shows the data bus signals on the GPIO LCD interface from the FPGA to U35.
Table 2-6: GPIO LED Connection from FPGA to U36
UCF Signal Name
XC2VP30 Pin
(U37)
Schem Signal
Name
LVC244 Buffer
(U36)
LED
DBG_LED_0 H13 DBG_LED_0 2 DBG0
DBG_LED_1 G13 DBG_LED_1 4 DBG1
DBG_LED_2 C10 DBG_LED_2 6 DBG2
DBG_LED_3 C11 DBG_LED_3 8 DBG3
DBG_LED_4 J14 DBG_LED_4 11 DBG4
DBG_LED_5 H14 DBG_LED_5 13 DBG5
DBG_LED_6 E14 DBG_LED_6 15 DBG6
DBG_LED_7 D14 DBG_LED_7 17 DBG7
Table 2-7: GPIO LCD Data Bus Connection from FPGA to U35
UCF Signal Name
XC2VP30 Pin
(U37)
Schem Signal
Name
LVCC3245
Translator
(U35)
LCD I/F
(J13)
FPGA_LCD_DB0 F19 FPGA_LCD_DB0 3 7
FPGA_LCD_DB1 F20 FPGA_LCD_DB1 4 8
FPGA_LCD_DB2 F17 FPGA_LCD_DB2 5 9
FPGA_LCD_DB3 G17 FPGA_LCD_DB3 6 10
FPGA_LCD_DB4 B21 FPGA_LCD_DB4 7 11
FPGA_LCD_DB5 A21 FPGA_LCD_DB5 8 12
FPGA_LCD_DB6 G18 FPGA_LCD_DB6 9 13
FPGA_LCD_DB7 H18 FPGA_LCD_DB7 10 14
FPGA_LCD_DIR C20 FPGA_LCD_DIR 2 -