参数资料
型号: HW-SPAR3-SK-UNI-G
厂商: Xilinx Inc
文件页数: 27/64页
文件大小: 0K
描述: KIT STARTER SPARTAN-3
产品变化通告: Adapter Replacement 23/May/2008
Development Systems Discontinuation 22/Jun/2009
标准包装: 1
系列: Spartan-3
类型: FPGA 配置
适用于相关产品: Spartan-3
所含物品: 面板、缆线、软件、数据表和用户手册
其它名称: 122-1521
R
Chapter 6
PS/2 Mouse/Keyboard Port
The Spartan ? -3 FPGA Starter Kit board includes a PS/2 mouse/keyboard port and the
standard 6-pin mini-DIN connector, labeled J3 on the board and indicated as 9 in
Figure 1-2 . Figure 6-1 shows the PS/2 connector, and Table 6-1 shows the signals on the
connector. Only pins 1 and 5 of the connector attach to the FPGA. A detailed schematic
appears in Figure A-7 .
2
1
4
6
5
3
UG130_c6_01_042404
Figure 6-1: PS/2 DIN Connector
Table 6-1:
PS/2 Connections to the Spartan-3 FPGA
PS/2 DIN Pin
1
2
3
4
5
6
Signal
DATA (PS2D)
Reserved
GND
Voltage Supply
CLK (PS2C)
Reserved
FPGA Pin
M15
GND
M16
Both a PC mouse and keyboard use the two-wire PS/2 serial bus to communicate with a
host device, the Spartan-3 FPGA in this case. The PS/2 bus includes both clock and data.
Both a mouse and keyboard drive the bus with identical signal timings and both use 11-bit
words that include a start, stop and odd parity bit. However, the data packets are
organized differently for a mouse and keyboard. Furthermore, the keyboard interface
allows bidirectional data transfers so the host device can illuminate state LEDs on the
keyboard.
The PS/2 bus timing appears Table 6-2 and Figure 6-2 . The clock and data signals are only
driven when data transfers occur, and otherwise they are held in the idle state at logic
High. The timings define signal requirements for mouse-to-host communications and
Spartan-3 FPGA Starter Kit Board User Guide
UG130 (v1.2) June 20, 2008
27
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