EP7209 datasheet(18/128 Pages) CIRRUS

18 / 128 page

EP7209

DS453PP2

3. FUNCTIONAL DESCRIPTION

The EP7209 device is a single-chip embedded con-

troller designed to be used in low cost and ultra-

low-power digital audio players. Operating at

74 MHz, the EP7209 delivers approximately

66 Dhrystone 2.1 MIPS of sustained performance

(74 MIPS peak). This is approximately the same as

a 100 MHz Pentium-based PC.

The EP7209 contains the following functional

blocks:

•

ARM720T processor which consists of the fol-

lowing functional sub-blocks:

ARM7TDMI CPU core (which supports

the logic for the Thumb instruction set, core

debug, enhanced multiplier, JTAG, and the

Embedded ICE) running at a dynamically

programmable clock speed of 18 MHz,

36 MHz, 49 MHz, or 74 MHz.

Memory Management Unit (MMU) com-

patible with the ARM710 core (providing

address translation and a 64 entry transla-

tion lookaside buffer) with added support

for Windows CE.

8 kbytes of unified instruction and data

cache with a four-way set associative cache

controller.

Write buffer

•

38,400 bytes (0x9600) of on-chip SRAM that

can be shared between the LCD controller and

general application use.

•

Memory interfaces for up to 6 independent

256 Mbyte expansion segments with program-

ming wait states.

•

27 bits of general purpose I/O - multiplexed to

provide additional functionality where neces-

sary.

•

Digital Audio Interface (DAI) for connection to

CD-quality DACs and codecs.

•

Interrupt controller

•

Advanced system state control and power man-

agement.

•

Two full-duplex 16550A compatible UARTs

with 16-byte transmit and receive FIFOs.

•

IrDA SIR protocol controller capable of speeds

up to 115.2 kbps.

•

Programmable 1-, 2-, or 4-bit-per-pixel LCD

controller with 16-level gray scaler.

•

Programmable frame buffer start address, al-

lowing a system to be built using only internal

SRAM for memory.

•

On-chip boot ROM programmed with serial

load boot sequence.

•

Two 16-bit general purpose timer counters.

•

A 32-bit Real Time Clock (RTC) and compar-

ator.

•

Dedicated LED flasher pin driven from the

RTC with programmable duty ratio (multi-

plexed with a GPIO pin).

•

Two synchronous serial interfaces for Micro-

wire or SPI peripherals such as ADCs, one sup-

porting both the master and slave mode and the

other supporting only the master mode.

•

Full JTAG boundary scan and Embedded ICE

support.

•

Two programmable pulse-width modulation

interfaces.

•

An interface to one or two Cirrus Logic CL-

PS6700 PC Card controller devices to support

two PC Card slots.

EP7209 Datasheet(PDF) 18 Page - Cirrus Logic

EP7209 Datasheet(HTML) 18 Page - Cirrus Logic

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