Ps/2 Serial Port - Altera DE2-115 User Manual

Figure 4-24 Connections between FPGA and ZT3232 (RS-232) chip
Signal Name
UART_RXD
UART_TXD
UART_CTS
UART_RTS
4 . 1 3 P S / 2 S e
4 . 1 3 P S / 2 S e
The DE2-115 board includes a standard PS/2 interface and a connector for a PS/2 keyboard or
mouse. Figure 4-25
keyboard and mouse on the DE2-115 board simultaneously by plugging an extension PS/2 Y-Cable
(See Figure 4-26). Instructions for using a PS/2 mouse or keyboard can be found by performing an
appropriate search on various educational websites. The pin assignments for the associated interface
are shown in Table 4-19.
Note: If users connect only one PS/2 equipment, the PS/2 interface between FPGA I/O
should be "PS2_CLK" and "PS2_DAT"
Table 4-18 RS-232 Pin Assignments
FPGA Pin No. Description
PIN_G12 UART Receiver
PIN_G9 UART Transmitter
PIN_G14 UART Clear to Send
PIN_J13 UART Request to Send
r i a l P o r t
r i a l P o r t
shows the schematic of the PS/2 circuit. In addition, users can use the PS/2
.
Figure 4-25 Connection between FPGA and PS/2
55
I/O Standard
3.3V
3.3V
3.3V
3.3V