Welcome; This Guide; Why Rs-232 Fpga Boards; The Pluto Boards - KNJN Pluto Manual

1 Welcome

1.1 This guide

Welcome to the KNJN FPGA RS-232 development boards guide.
Although FPGA boards can be intimidating, the Pluto FPGA boards are easy to use. This document is partitioned in short
and easy to read chapters, and will explain all you need to know about your new FPGA board.

1.2 Why RS-232 FPGA boards?

Although RS-232 is overshadowed by USB's popularity, RS-232 provides an easier way to interact with FPGAs, and so is
valuable as a learning tool.

1.3 The Pluto boards

This guide applies to five different boards (Pluto, Pluto-II, Pluto-IIx / HDMI and Pluto-3).
Along this document, when a paragraph apply to all of them, they are collectively named "the Pluto boards" or "the FPGA
boards".
Check them also on the KNJN

1.4 Boards characteristics

Pluto
FPGA (vendor page) EP1K10
Datasheet (PDF) ACEX 1K
Logic cells 576
IO pins 41
PLL/DLL -
External clocks up to 2
Boot-PROM (1) -
On-board oscillator 25MHz
DIL8 oscillator header -
Push-button -
JTAG header -
LED(s) 1
ADC board ready Flashy / Widy
Dimensions 58 x 28 mm
(1) Minimum boot-PROM size shown here. Actual product may use a higher capacity boot-PROM.
FPGA RS-232 development boards
website.
Pluto-II Pluto-IIx
EP1C3 XC3S50A
Cyclone Spartan-3A
2910 1584 or 4032
51 48
PLL DLL
up to 4 up to 4
1Mbit 1Mbit or 4Mbit
25MHz 25MHz
- -
- -
(see chapter 10) (see chapter 10)
1 1
Flashy / Widy Flashy / Widy
58 x 28 mm 58 x 28 mm
Pluto-IIx HDMI Pluto-3
or 200A XC3S200A EP2C5
Spartan-3A Cyclone II
4032 4608
36 65
DLL PLL
up to 4 up to 4
4Mbit 4Mbit
25MHz 25MHz
Yes Yes
- Yes
(see chapter 10) Yes
2 2
Flashy / Widy FlashyD / WidyD
58 x 28 mm 58 x 41 mm
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