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3 Development Board Circuit
3.5 USB 2.0 interface
DBUG408-1.0E
11(16)
3.4.2
Pinout
Table 3-3 GW1NSR-LV4CMG64P Clock and Reset Pinout
Signal Name
FPGA Pin No. BANK
I/O Level
Description
F1_CLK
C5
1
3.3V
12MHz crystal oscillator input
F1_IIS_CLK
C4
1
3.3V
8.192MHz
F1_RST_N
A5
1
3.3V
Reset Signal, active Low
Table 3-4 GW2AR-LV18QN88P Clock and Reset Pinout
Signal Name
FPGA Pin No. BANK I/O Level
Description
F2_CLK
10
6
3.3V/2.5V
12MHz crystal oscillator
input
F2_IIS_CLK
35
4
3.3V
8.192MHz
F2_RST_N
19
6
3.3V/2.5V
Reset Signal, active-low
3.5
USB 2.0 interface
3.5.1
Introduction
USB 2.0 interface is directly connected to FPGA through configuration
resistor. The connection diagram is as shown in Figure 3-3.
Figure 3-3 Connection Diagram of FPGA and USB 2.0 Interface
PULLIP
USB_D-_CN
USB_D+_CP
USB_TERM_P
USB_D-_CP
USB_TERM_N
USB_D-
USB_D+
USB_D+_CN
RC Circuit
USB2.0
D+
D-
VBUS_DETECT
3.5.2
Pinout
Table 3-5 GW1NSR-LV4CMG64P USB 2.0 Module Pinout
Signal Name
FPGA Pin No. BANK I/O Level Description
1N_Pullip
G6
2
3.3V
Pull-up
U_CP
G7
2
3.3V
USB+ signal
U/-_CN
H7
2
3.3V
USB+ Reference