PWM ON SAMSUNG's S3C2410X

Building Embedded LINUX SYSTEM

Outline

• SAMSUNG's S3C2410X components

• CLOCK& POWER MANAGEMENT

• PWM TIMER

• I/O PORTS

• Finally Project

Building Embedded LINUX SYSTEM

SAMSUNG's S3C2410X components(1/4)

• 1.8V core, 3.3V memory, 3.3V external I/O microprocesso

r with 16KB I-Cache/16KB D-Cache/MMU

• External memory controller (SDRAM Control and Chip Se

lect logic)

• LCD controller (STN and TFT) with 1-ch LCD-dedicated

DMA

• 4-ch DMAs with external request pins

• 3-ch UART (IrDA1.0, 16-Byte Tx FIFO, and 16-Byte Rx

FIFO) / 2-ch SPI

Building Embedded LINUX SYSTEM

SAMSUNG's S3C2410X components(2/4)

• 1-ch multi-master IIC-BUS/1-ch IIS-BUS controller

• SD Host interface version 1.0 & Multi-Media Card Protoc

ol version 2.11 compatible

• 2-port USB Host /1- port USB Device (ver 1.1)

• 4-ch PWM timers & 1-ch internal timer

• Watch Dog Timer

• 117-bit general purpose I/O ports / 24-ch external interrupt

source

• Power control: Normal, Slow, Idle and Power-off mode

Building Embedded LINUX SYSTEM

SAMSUNG's S3C2410X components(3/4)

• 8-ch 10-bit ADC and Touch screen interface

• RTC with calendar function

• On-chip clock generator with PLL

Building Embedded LINUX SYSTEM

SAMSUNG's S3C2410X components(4/4)

Building Embedded LINUX SYSTEM

CLOCK & POWER MANAGEMENT(1/3)

• The Clock control logic in S3C2410X can generate the

required clock signals including FCLK for CPU, HCLK

for the AHB bus peripherals, and PCLK for the APB bus

peripherals.

• FCLK is used by ARM920T.

• HCLK is used for AHB bus, which is used by the

ARM920T, the memory controller, the interrupt controller,

the LCD controller, the DMA and the USB host block.

Building Embedded LINUX SYSTEM

CLOCK & POWER MANAGEMENT(2/3)

• PCLK is used for APB bus, which is used by the

peripherals such as WDT, IIS, I2C, PWM timer, MMC

interface, ADC, UART, GPIO, RTC and SPI.

• The power management block controls the system clocks

by software for the reduction of power consumption in the

S3C2410X.

• These schemes are related to PLL, clock control logics

(FCLK, HCLK, and PCLK) and wakeup signals.

Building Embedded LINUX SYSTEM

CLOCK & POWER MANAGEMENT(3/3)

Building Embedded LINUX SYSTEM

PWM TIMER(1/4)

• Five 16-bit timers

• Timer 0, 1, 2, and 3 have Pulse Width Modulation (PWM) functio

n.

• Timer 4 has an internal timer only with no output pins.

• Two 8-bit prescalers & Two 4-bit divider

• The timer 0 and 1 share an 8-bit prescaler, while the timer 2, 3 and

4 share other 8-bit prescaler.

• Each timer has a clock divider which 5 different divided signals (1

/2, 1/4, 1/8, 1/16, and TCLK).

Building Embedded LINUX SYSTEM

PWM TIMER(2/4)

• Programmable duty control of output waveform (PWM)

• Dead-zone generator

• The dead zone is for the PWM control in a power device.

Building Embedded LINUX SYSTEM

PWM TIMER(3/4)

Building Embedded LINUX SYSTEM

PWM TIMER(4/4)

Building Embedded LINUX SYSTEM

I/O PORTS

• The S3C2410X has 117 multi-functional input/output port

pins. The ports are:

• Port A (GPA): 23-output port

• Port B (GPB): 11-input/output port

• Port C (GPC): 16-input/output port

• Port D (GPD): 16-input/output port

• Port E (GPE): 16-input/output port

• Port F (GPF): 8-input/output port

• Port G (GPG): 16-input/output port

• Port H (GPH): 11-input/output port

Building Embedded LINUX SYSTEM

Finally Project

• 撰寫一個驅動程式 ,透過 PWM 裝置驅動馬達 ,調整馬達的輸出功率 .

Embedded system S3C2410 GPIO control line

PWM

Motor Controller