EP9302-CQZ Cirrus Logic Inc, EP9302-CQZ Datasheet - Page 733

• Manufacturer Part Number: EP9302-CQZ
• Description: IC ARM9 SOC PROCESSOR 208LQFP
• Manufacturer: Cirrus Logic Inc
• Series: EP9r

Specifications of EP9302-CQZ

• Program Memory Type: ROMless
• Package / Case: 208-LQFP
• Core Processor: ARM9
• Core Size: 16/32-Bit
• Speed: 200MHz
• Connectivity: EBI/EMI, Ethernet, I²C, IrDA, SPI, UART/USART, USB
• Peripherals: AC'97, DMA, I&sup2:S, LED, MaverickKey, POR, PWM, WDT
• Number Of I /o: 19
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 1.65 V ~ 3.6 V
• Data Converters: A/D 5x12b
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Processor Series: EP93xx
• Core: ARM920T
• Data Bus Width: 32 bit
• Data Ram Size: 16 bit
• Interface Type: USB, USART, SPI
• Maximum Clock Frequency: 200 MHz
• Number Of Programmable I/os: 37
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: MDK-ARM, RL-ARM, ULINK2
• Development Tools By Supplier: EDB9302A-Z
• Controller Family/series: (ARM9)
• No. Of I/o's: 19
• Ram Memory Size: 16MB
• Cpu Speed: 200MHz
• No. Of Timers: 4
• Embedded Interface Type: AC97, I2S, SPI, UART, USB
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 598-1132 - KIT DEVELOPMENT EP9302 ARM9
• Eeprom Size: -
• Program Memory Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 598-1137

DS785UM1
24.1 Introduction
24.2 Theory of Operation
The Pulse Width Modulators (PWMs) have the following features:
Each PWM is an Advanced Microcontroller Bus Architecture (AMBA) compliant system-on-a
chip (SOC) peripheral. Each is a configurable dual-output, dual clock input AMBA slave
module, and each connects to the Advanced Peripheral Bus (APB). The PWM Interfaces
comply with the AMBA Specifications (Rev.2.0). This design assumes little-endian memory
organization.
Both of the PWM peripherals are programmed via the APB, receive scaled clock inputs from
the clock controller and produce outputs at external pins.
The processor has two independent DC-level PWM outputs, PWMOUT and PWMO1. The
PWM outputs are sourced by programable duty-cycle pulse generators. From a
programmer's point of view, for each channel there are two 16-bit registers. These can be
used to specify the width of the pulse cycle (in terms of number of PWM clock cycles), and
the duration of high-phase of the pulse (set in terms of the number of PWM clock cycles).
Note: The EP9307 processor has one PWM with one output, PWMOUT.
Note: The EP9301, EP9302, EP9312, and EP9315 processors each have two PWMs with
• Configurable dual output
• Separate input clocks for each PWM output
• 16-bit resolution
• Programmable synchronous mode support
• Programmable pulse width (duty cycle), interval (frequency), and polarity
• Allows external input to start PWM
• Static programming: PWM is stopped
• Dynamic programming: PWM is running
• Updates duty cycle, frequency, and polarity at end of a PWM cycle
two outputs, PWMOUT and PWMO1. PWMO1 is an alternate function for EGPIO14.
Copyright 2007 Cirrus Logic
24Pulse Width Modulator
Chapter 24
24-1
24