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ML630 Board User Guide
www.xilinx.com
19
UG828 (v1.0) September 28, 2011
Detailed Description
User Push Buttons (Active High)
Figure 1-2
callout [22]
SW4, SW6, SW8 and SW9 are active-High user pushbuttons that are connected to user I/O
pins on FPGA U1 as shown in
Table 1-5
. These switches can be used for any purpose
determined by the user.
FPGA U1 User GPIO Header
Figure 1-2
callout [23]
A standard 2 x 6, 100-mil pitch header (J285) brings out six FPGA I/Os for test purposes.
Table 1-6
lists these pins. J285 odd pin numbers are wired to GND (ground).
FPGA U1 USB to UART Bridge
Figure 1-2
callout [24]
Communications between the ML630 board FPGA U1 and a host computer are
accomplished through a USB cable connected to J54. Control is provided by U26, a USB to
UART bridge (Silicon Laboratories CP2103).
Table 1-7
lists the pin assignments and signals
for the USB connector J54.
Table 1-5:
FPGA U1 User Pushbuttons
FPGA U1 Pin
Net Name
Reference
Designator
H26
U1_USER_PB1
SW4
J26
U1_USER_PB2
SW6
N24
U1_USER_PB3
SW8
N23
U1_USER_PB4
SW9
Table 1-6:
FPGA U1 User GPIO Header J285
FPGA U1 Pin
Net Name
J285 Pin
J35
U1_USER_IO_1
2
K35
U1_USER_IO_2
4
D35
U1_USER_IO_3
6
E35
U1_USER_IO_4
8
P35
U1_USER_IO_5
10
P34
U1_USER_IO_6
12
Table 1-7:
: J54 USB Mini-B Connector Pin Assignments and Signals
J54 Pin
Signal Name
Description
1
VBUS
+5V from host system
2
U1_USB_D_N
Bidirectional differential serial data (N-side)