EP7312-IV-90 Cirrus Logic Inc, EP7312-IV-90 Datasheet - Page 3

• Manufacturer Part Number: EP7312-IV-90
• Description: IC ARM720T MCU 90MHZ 208-LQFP
• Manufacturer: Cirrus Logic Inc
• Series: EP7r

Specifications of EP7312-IV-90

• Core Processor: ARM7
• Core Size: 32-Bit
• Speed: 90MHz
• Connectivity: Codec, DAI, EBI/EMI, IrDA, Keypad, SPI/Microwire1, UART/USART
• Peripherals: LCD, LED, MaverickKey, PWM
• Number Of I /o: 27
• Program Memory Type: ROMless
• Ram Size: 56K x 8
• Voltage - Supply (vcc/vdd): 2.3 V ~ 2.7 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 208-LQFP
• For Use With: 598-1209 - KIT DEVELOPMENT EP73XX ARM7
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -
• Other names: 598-1246

Table of Contents
FEATURES ...........................................................................................................................................1
OVERVIEW ...........................................................................................................................................1
Description of the EP7312’s Components, Functionality, and Interfaces ....................................6
ELECTRICAL SPECIFICATIONS ......................................................................................................13
Timings ...............................................................................................................................................15
DS508F1
Processor Core - ARM720T ..................................................................................................................................6
Power Management ..............................................................................................................................................6
MaverickKey™ Unique ID ......................................................................................................................................6
Memory Interfaces .................................................................................................................................................6
Digital Audio Capability .........................................................................................................................................7
Universal Asynchronous Receiver/Transmitters (UARTs) .....................................................................................7
Digital Audio Interface (DAI) ..................................................................................................................................7
CODEC Interface ..................................................................................................................................................8
SSI2 Interface ........................................................................................................................................................8
Synchronous Serial Interface ................................................................................................................................8
LCD Controller .......................................................................................................................................................8
64-Key Keypad Interface .......................................................................................................................................8
Interrupt Controller ................................................................................................................................................9
Real-Time Clock ....................................................................................................................................................9
PLL and Clocking ..................................................................................................................................................9
DC-to-DC Converter Interface (PWM) .................................................................................................................10
Timers .................................................................................................................................................................10
General Purpose Input/Output (GPIO) ................................................................................................................10
Hardware Debug Interface ..................................................................................................................................10
LED Flasher ........................................................................................................................................................10
Internal Boot ROM ...............................................................................................................................................10
Packaging ............................................................................................................................................................10
Pin Multiplexing ...................................................................................................................................................11
System Design ....................................................................................................................................................12
Absolute Maximum Ratings .................................................................................................................................13
Recommended Operating Conditions .................................................................................................................13
DC Characteristics ..............................................................................................................................................13
SDRAM Interface ................................................................................................................................................16
Static Memory .....................................................................................................................................................21
SSI1 Interface ......................................................................................................................................................26
SSI2 Interface ......................................................................................................................................................27
LCD Interface ......................................................................................................................................................28
JTAG Interface .....................................................................................................................................................29
Timing Diagram Conventions ....................................................................................................................15
Timing Conditions ......................................................................................................................................15
SDRAM Load Mode Register Cycle ..........................................................................................................17
SDRAM Burst Read Cycle .........................................................................................................................18
SDRAM Burst Write Cycle .........................................................................................................................19
SDRAM Refresh Cycle ..............................................................................................................................20
Static Memory Single Read Cycle .............................................................................................................22
Static Memory Single Write Cycle .............................................................................................................23
Static Memory Burst Read Cycle ...............................................................................................................24
Static Memory Burst Write Cycle ...............................................................................................................25
©
Copyright Cirrus Logic, Inc. 2005
(All Rights Reserved)
High-Performance, Low-Power System on Chip
EP7312
3