EP7312-CBZ

USER INTERFACE EP7312 Data Sheet FEATURESFEATURES High-performance, ARM 720T Processor Low-power, System-on-chip ARM7TDMI CPU Operating at Speeds of 74 and with SDRAM & Enhanced 90 MHz Digital Audio Interface 8 kBytes of Four-way Set-associative Cache MMU with 64-entry TLB Thumb Code Support Enabled OVERVIEWOVERVIEW Ultra low power The Cirrus Logic EP7312 is designed for ultra-low-power 90 mW at 74 MHz Typical portable and line-powered applications such as portable 108 mW at 90 MHz Typical consumer entertainment devices, home and car audio juke box systems, and general purpose industrial control applications, or <.03 mW in the Standby State any device that features the added capability of digital audio Advanced Audio Decoder/decompression Capability compression & decompression. The core-logic functionality of Supports bit streams with adaptive bit rates. the device is built around an ARM720T processor with Allows for support of multiple audio decompression 8 kBytes of four-way set-associative unified cache and a write algorithms (MP3, WMA, AAC, Audible, etc.). buffer. Incorporated into the ARM720T is an enhanced memory management unit (MMU) which allows for support of sophisticated operating systems like Microsoft Windows CE and Linux . (cont.) (cont.) BLOCK DIAGRAM Digital EPB Bus Clocks & Audio Timers Interface ARM720T Power Management Serial Interrupts, ICE-JTAG Interface PWM & GPIO ARM7TDMI CPU Core 8 KB Write Keypad& Cache Buffer (2) UARTs Touch Boot Bus w/ IrDA MMU Screen I/F ROM Bridge Internal Data Bus Memory Controller On-chip SRAM LCD TM MaverickKey 48 KB Controller SRAM I/F SDRAM I/F MEMORY and STORAGE Copyright Cirrus Logic, Inc. 2011 (All Rights Reserved) MAR 11 EP7312 High-Performance, Low-Power System on Chip FEATURES (cont) 48 KBytes of On-chip SRAM Dedicated LED Flasher Pin from the RTC Internal Peripherals MaverickKey IDs Two 16550-compatible UARTs 32-bit unique ID can be used for DRM-compliant 128- bit random ID. IrDA Interface Available in 74 and 90 MHz clock speeds. Two PWM Interfaces LCD controller Real-time Clock Interfaces directly to a single-scan panel monochrome Two General-purpose 16-bit Timers STN LCD. Interrupt Controller Interfaces to a single-scan panel color STN LCD with Boot ROM minimal external glue logic. Package Full JTAG Boundary Scan and Embedded ICE Support 208-Pin LQFP Integrated Peripheral Interfaces 256-Ball PBGA 32-bit SDRAM Interface, Up to 2 External Banks The fully static EP7312 is optimized for low power 8/32/16-bit SRAM/FLASH/ROM Interface dissipation and is fabricated using a 0.25 micron CMOS Digital Audio Interface provides glueless interface to process. low-power DACs, ADCs, and CODECs. Two Synchronous Serial Interfaces (SSI1, SSI2) CODEC Sound Interface 88 Keypad Scanner 27 General-purpose Input/Output Pins OVERVIEW (cont.) The EP7312 is designed for ultra-low-power operation. Its core The EP7312 integrates an interface to enable a direct operates at only 2.5 V, while its I/O has an operation range of connection to many low cost, low power, high quality audio 2.5V3.3V. The device has three basic power states: converters. In particular, high quality ADCs, DACs, or operating, idle and standby. CODECs such as the Cirrus Logic CS53L32A, CS43L42, and CS42L50 are easily added to an EP73xx design via the DAI. MaverickKey unique hardware programmed IDs are a solution Some of these devices feature digital bass and treble boost, to the growing concern over secure web content and digital volume control and compressor-limiter functions. commerce. With Internet security playing an important role in the delivery of digital media such as books or music, Simply by adding desired memory and peripherals to the traditional software methods are quickly becoming unreliable. highly integrated EP7312 completes a low-power system The MaverickKey unique IDs provide OEMs with a method of solution. All necessary interface logic is integrated on-chip. utilizing specific hardware IDs such as those assigned for SDMI (Secure Digital Music Initiative) or any other authentication mechanism. 2 Copyright Cirrus Logic, Inc. 2011 (All Rights Reserved) DS508F2