FT902L-R datasheet(23/67 Pages) BRIDGETEK

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FT900

/1/2/3 Revision C Embedded Microcontroller Datasheet

Version 1.0

Document No. BRT_000172 Clearance No.: BRT#087

Function Description

4.1

Architectural Overview

The FT900/1/2/3 series embedded microcontrollers include a high performance 32-bit FT32 RISC core

processor and 256kB hi-speed Flash memory for software program downloading with a One-Wire

debugger interface. The core processor uses a 32-bit I/O system bus to connect to all of the peripherals.



32-bit MCU Processor Core



256kB Flash Memory



256kB Shadow Program Memory



64kB Data Memory



USB2.0 host controller with battery charging capability



USB2.0 device controller with battery charging detection capability



10/100Mbps Ethernet controller (FT900 and FT901 only)



Two CAN bus interfaces (FT900 and FT902 only)



Real Time Clock



One-Wire debugger interface



One SPI master interface and two SPI slave interfaces



One I2C master and one I2C slave interface



One I2S bus interface



Two programmable 8Mbit/s UARTs



Four 16-bit timers and one 32-bit watchdog timer



Camera parallel interface



SD host controller



8-Channel PWM with optional 2-Channel Audio PCM



10-bit two channel 1 MS/s DAC



Configurable 8-bit/10-bit seven channel 480/960 kS/s ADC



General purpose I/O interface

The functions for each controller / interface are briefly described in the following subsections.

4.2

FT32 Core Processor

The FT32 core processor is running at frequencies of up to 100MHz. The processor contains the CPU itself

with control logic and its 256kB program memory and 64kB data memory. The outside connections for

the core processor are the memory-mapped I/O interface, the interrupt interface, asynchronous reset

and the system clock.

4.3

256kB Flash Memory

The internal 256kB Flash memory is used to store a boot loader or user application of the FT900/1/2/3

series. It is a high performance and low power consumption memory that supports up to 80MHz serial

clock. The system will perform memory copy from Flash memory to CPU program memory automatically

after system power on.

4.4

Boot Sequence

After the initial memory copy completes, the CPU jumps to program memory location zero. This may be

the start of the user application which is stored in advance in Flash memory, or a boot loader only which

allows program memory to perform modification via (e.g.) UART or USB.

The option of a boot loader is a special purpose routine in the FT900/1/2/3 series embedded

microcontroller. It is a small routine stored in the Flash memory. Typically the boot loader is 1-4kbytes in

size, and is loaded at the top of the available memory.

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