EP7212 Datasheet, PDF (1/136 Pages) Cirrus Logic – HIGH-PERFORMANCE, LOW-POWER SYSTEM-ON-CHIP WITH LCD CONTROLLER AND DIGITAL AUDIO INTERFACE(DAI)

EP7212
EP7212
FEATURES
n ARM720T processor
— ARM7TDMI CPU
— 8 K-bytes of four-way set-associative cache
— MMU with 64-entry TLB (transition look-aside buffer)
— Write Buffer
— Windows^ CE enabled
— Thumb code support enabled
n Dynamically programmable clock speeds of
18, 36, 49, and 74 MHz at 2.5 V
n Performance matching 100-MHz Intel^
Pentium-based PC
n Ultra low power
— Designed for applications that require long battery life
while using standard AA/AAA batteries or rechargeable
cells
— Typical Power Numbers
q 90 mW at 74 MHz in the Operating State
q 30 mW at 18 MHz in the Operating State
q 10 mW in the Idle State (clock to the CPU stopped,
everything else running)
q <1 mW in the Standby State (realtime clock ‘on’,
everything else stopped)
(cont.)
High-Performance, Low-Power
System-on-Chip with LCD
Controller and Digital Audio
Interface (DAI)
OVERVIEW
The EP7212 is designed for ultra-low-power applica-
tions such as organizers / PDAs, two-way pagers,
smart cellular phones or any vertical PDA device that
features the added capability of digital audio decom-
pression. The core-logic functionality of the device is
built around an ARM720T processor with 8 K-bytes of
four-way set-associative unified cache and a write
buffer. Incorporated into the ARM720T is an
enhanced memory management unit (MMU) which
allows for support of sophisticated operating systems
like Microsoft Windows CE.
(cont.)
Functional Block Diagram
13-MHZ INPUT
3.6864 MHZ
PLL
32.768 KHZ
NPOR, RUN,
RESET, WAKEUP
BATOK, EXTPWR
PWRFL, BATCHG
EINT[1-3], FIQ,
MEDCHG
FLASHING LED DRIVE
PORTS A, B, D (8-BIT)
PORT E (3-BIT)
KEYBD DRIVERS (0-7)
BUZZER DRIVE
DC TO DC
ADCCLK, ADCIN,
ADCOUT, SMPCLK,
ADCCS
SSICLK, SSITXFR,
SSITXDA, SSIRXDA,
SSIRSFR
32.768-KHZ
OSCILLATOR
STATE CONTROL
POWER
MANAGEMENT
INTERRUPT
CONTROLLER
RTC
GPIO
PWM
SSI1 (ADC)
DAI
SSI2
CODEC
ARM720T
ARM7TDMI
CPU CORE
8-KBYTE
CACHE
MMU
WRITE
BUFFER
TIMER
COUNTERS(2)
ON-CHIP
BOOT ROM
INTERNAL DATA BUS
MEMORY CONTROLLER
CL-PS6700 INTF
EXPANSION CNTRL
DRAM CNTRL
INTERNAL ADDRESS BUS
LCD DMA
ICE-JTAG
LCD
CONTROLLER
ON-CHIP SRAM
38,400 BYTES
IrDA
EPB BRIDGE
EPB BUS
UART1
UART2
D[0-31]
PB[0-1], NCS[4-5]
EXPCLK, WORD, NCS[0-3],
EXPRDY, WRITE
MOE, MWE,
RAS[0-1], CAS[0-3]
A[0-27],
DRA[0-12]
TEST AND
DEVELOPMENT
LCD DRIVE
LED AND
PHOTODIODE
ASYNC
INTERFACE 1
ASYNC
INTERFACE 2
Cirrus Logic, Inc.
P.O. Box 17847, Austin, Texas 78760
[phone] FAX: [phone]
http://www.cirrus.com
Copyright © Cirrus Logic, Inc. 2000
(All Rights Reserved)
DS474PP1
FEB 00
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