EP7312 Datasheet, PDF (3/64 Pages) Cirrus Logic – HIGH-PERFORMANCE, LOW-POWER SYSTEM ON CHIP WITH SDRAM AND ENHANCED DIGITAL AUDIO INTERFACE

Table of Contents
EP7312
High-Performance, Low-Power System on Chip
FEATURES ...........................................................................................................................................1
OVERVIEW ...........................................................................................................................................1
FEATURES (cont) .......................................................................................................................................................2
OVERVIEW (cont.) ......................................................................................................................................................2
Description of the EP7312’s Components, Functionality, and Interfaces ....................................6
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 .......................................................................................................................................9
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
ELECTRICAL SPECIFICATIONS ......................................................................................................13
Absolute Maximum Ratings .................................................................................................................................13
Recommended Operating Conditions ................................................................................................................. 13
DC Characteristics .............................................................................................................................................. 13
Timings ...............................................................................................................................................15
Timing Diagram Conventions .................................................................................................................... 15
Timing Conditions ...................................................................................................................................... 15
SDRAM Interface ................................................................................................................................................ 16
SDRAM Load Mode Register Cycle .......................................................................................................... 17
SDRAM Burst Read Cycle ......................................................................................................................... 18
SDRAM Burst Write Cycle ......................................................................................................................... 19
SDRAM Refresh Cycle .............................................................................................................................. 20
Static Memory ..................................................................................................................................................... 21
Static Memory Single Read Cycle ............................................................................................................. 22
Static Memory Single Write Cycle ............................................................................................................. 23
Static Memory Burst Read Cycle ............................................................................................................... 24
Static Memory Burst Write Cycle ............................................................................................................... 25
SSI1 Interface ...................................................................................................................................................... 26
SSI2 Interface ...................................................................................................................................................... 27
LCD Interface ...................................................................................................................................................... 28
DS508PP5
©Copyright Cirrus Logic, Inc. 2003
(All Rights Reserved)
3