Block diagram

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Fig 1. NanoNote Block Diagram
Fig 2. JZ4720 Multimedia Processor Block Diagram

In the figure 1 we can see the block diagrams for NanoNote plataform, using the multimedia processor (internal diagram on figure 2) JZ4720 from Ingenic Semiconductor Co.

[edit] Basic Description

  • The LCD has a size of 3.0" TFT type, with a resolution of 320x240 pixels.
  • The SDRAM is conected to the processor through a 16-bit data bus, a 13-bit address bus and a control bus. On the first version has a size of 32MB but some development versions are installed 64MB.
  • The NAND Flash Memory is accessed through a data bus 8-bit and a bit control bus. The size of this memory is 2GB
  • The MicroSD memory connector has a 4-bits data bus and some control lines
  • In the card there are two cristal for the processor, one of them (32768Hz) is for the RTC Oscillator, and the another one (12Mhz) is the Main Oscillator.
  • The Keyboard from NanoNote is a simple 8x8 matrix that uses 16 GPIOs of the processor to "map" 59 keys
  • In the case of the Audio we have the stereo output going to the headphones connector and if this isn't conected the speaker is turning On
  • The USB Host connector is connected with a 3-bit bus: 2-bit for diferential data and one for the USB ID. Moreover the USB Device connector just receives the lines of the diferential data
  • We use two GPIOs from the processor for the Serial Console and four more GPIOs like probe points of the JTAG.
  • Finally we have a start switch (Boot Modes) with two modes for boot: From USB Device or Boot from 2048 page size NAND flash at CS1.

Now we will see the order in the PCB of each basic component.

Hardware basics#USBHardware basics#AudioHardware basics#AudioFile:Jz4720diagram.jpgSDRAMSDHardware basics#AudioHardware basics#Sertial and JTAGBoot Modes
NanoNote Board, component side

NANDLCDHardware basics#Keyboard
NanoNote Board, copper side
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