ep7312 Cirrus Logic, Inc., ep7312 Datasheet - Page 3

• Manufacturer Part Number: ep7312
• Description: High-performance, Low-power, System-on-chip With Sdram & Enhanced Digital Audio Interface
• Manufacturer: Cirrus Logic, Inc.

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
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