CYC1000 User Guide
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January 2020
3.3.8
User I/O
The CYC1000 board has two additional pins that can be connected to the board and take GPIOs.
Board Reference
FPGA Pin No.
Description
I/O Standard
AIN
PIN_T12
GPIO
3.3 V
AIN7
PIN_R11
GPIO
3.3 V
GND
N/A
Ground
N/A
3.3.9
Communication and Configuration
The CYC1000 board uses a single chip to perform configuration of the device and USB to UART
communications, having each described below.
3.3.9.1
UART Communication
UART to USB communication supports USB 2.0 High Speed (up to 480 Mb/s) independently of
other protocols used in the chip like JTAG. Below is the connection schematic and pinning
information.
Board Reference
FPGA Pin No.
Description
I/O Standard
BDBUS0
PIN_R7
Transmitter output of FT2232H (Tx)
3.3 V
BDBUS1
PIN_T7
Receiver input of FT2232H (Rx)
3.3 V
BDBUS2
PIN_R6
Ready To Send handshake output (RTS)
3.3 V
BDBUS3
PIN_T6
Clear To Send handshake input (CTS)
3.3 V
BDBUS4
PIN_R5
Data Transmit Ready (DTR)
3.3 V
BDBUS5
PIN_T5
Data Set Ready (DSR)
3.3 V
Figure 12 - User I/O Connections
Figure 13
–
UART Connections