Project Design Document (PDD)

Descriptive Project Name & Mnemonic

Author:

Date:

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Revision 2 Date:

Revision 3 Date:

1.0 Architectural Design
2.0 Hardware Design
2.1 State Flow Diagrams
2.2 Schematics
2.3 Timing Diagrams
2.4 Theory of Operation
3.0 Software Design
3.1 Static Design
3.2 Functional Design
3.3 Dynamic Design4.0 Glossary
5.0 Appendixes

1.  Architectural Design

2.  Hardware Design

2.1.  State Flow Diagrams

2.2.  Schematics

2.3.  Timing Diagrams

2.4.  Theory of Operation

3.  Software Design

3.1.  Static Design

3.2.  Functional Design

3.3.  Dynamic Design

4.  Glossary

Word or Phrase / Meaning in this document

5.  Appendixes (example)

USB 1.x/2.0 standard pinout
Pin / Name / Cable color / Description
1 / VBUS / Red / +5 V
2 / D− / White / Data −
3 / D+ / Green / Data +
4 / GND / Black / Ground
SD Memory card specification

SPI: Serial Peripheral Interface Bus is primarily used by embedded microcontrollers. This bus type supports only a 3.3-volt interface.

SPI Bus
Pin / Name / I/O / Logic / Description
1 / nCS / I / PP / Card Select (Neg True)
2 / DI / I / PP / Data In [MOSI]
3 / VSS / S / S / Ground
4 / VDD / S / S / Power
5 / CLK / I / PP / Clock [SCLK]
6 / VSS / S / S / Ground
7 / DO / O / PP / Data Out [MISO]
8 / NC nIRQ / . O / . OD / NC (Memory Cards) Interrupt (SDIO Cards)
9 / NC / . / . / NC

Notes:

1.  Direction is relative to card. I = Input, O = Output.

2.  PP = Push-Pull logic, OD = Open-Drain logic.

3.  S = Power Supply, NC = Not Connected (or logical high).

SD Memory Speed List

This table lists common ratings, the minimum transfer rates, and the corresponding Speed Class (though the comparison is not always exact).

Rating
66×
100×
133×
150×
200×
266×
300×
400×
600×

TFT LCD Panel

No / Symbol / I/O / Description
1 / VDD / P / Power Supply
2 / VDD / P / Power Supply
3 / GND / P / Ground
4 / GND / P / Ground
5 / IN0- / I / LVDS receiver negative signal channel 0
6 / IN0+ / I / LVDS receiver positive signal channel 0
7 / GND / P / Ground
8 / IN1- / I / LVDS receiver negative signal channel 1
9 / IN1+ / I / LVDS receiver positive signal channel 1
10 / GND / P / Ground
11 / IN2- / I / LVDS receiver negative signal channel 2
12 / IN2+ / I / LVDS receiver positive signal channel 2
13 / GND / P / Ground
14 / CLK- / I / LVDS receiver negative signal clock
15 / CLK+ / I / LVDS receiver positive signal clock
16 / GND / P / Ground
17 / NC / - / No connection
18 / NC / - / No connection
19 / GND / P / Ground
20 / GND / P / Ground

CN2 (LED Connector)

No / Symbol / I/O / Description / Wire Color
1 / VL1 / P / LED power supply(high voltage) / Red
2 / VL2 / P / LED power supply(GND) / White

Note: I/O definition:

I-----Input O---Output P----Power/Ground