Silicon Motion SM2702 - Manual

Mobile Storage
Zoom Family
www.siliconmotion.com
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material contained herein, may be reproduced without written consent of the manufacturer.
© Copyright 2011 Silicon Motion, Inc.
SD Controller
SM2702
The SM2702 is the state-of-the-art SD memory card
controller that complies with the latest SD 3.0x
specifications. The SM2702 is targeted for portable,
stationary and embedded applications by supporting
full coverage of card capacity including Standard
Capacity SD Memory Card (SDSC), High Capacity
SD Memory Card (SDHC) and Extended Capacity SD
Memory Card (SDXC, more than 32GB and up to
128GB). The advanced security and partitioning
functions just fit the requirements for mobile devices,
including SmartPhone, navigation devices, and
MP3/MP4 media players.
The SM2702 supports the high speed NAND interface,
including ONFI 2.x and Toggle mode, to achieve the
maximum data transfer rate for ever higher
performance. With Silicon Motion ’s enhanced flash
technologies, and the powerful, configurable BCH
ECC engine, the SM2702 provides superior security,
flexibility and performance for mainstream products in
the market.
Applications
 SD cards of all form factors, including
SD/miniSD/microSD
 Embedded system flash controller
General Features
 Adaptive power management control
 Built-in Power-on Reset (POR), Oscillator (OSC),
Voltage Detector (VDT) and Voltage Regulators
Key Features
 SD 3.0x Interface

Complies to SD specifications version 2.x/3.0x
(UHS104)

Supports dual voltage 3.3V and 1.8V host
interface power supply

Password protection of cards

Switch function command supports Bus Speed
Mode, Command System and future functions

Bus Speed Mode:
- DS: Default Speed mode: 3.3V signaling,
frequency up to 25 MHz, up to 12.5 MB/sec
- HS: High Speed mode: 3.3V signaling,
frequency up to 50 MHz, up to 25 MB/sec
- SD: 1.8V signaling, frequency up to 25 MHz,
up to 12.5 MB/sec
- SDR25: 1.8V signaling, frequency up to 50
MHz, up to 25 MB/sec
- SDR50: 1.8V signaling, frequency up to 100
MHz, up to 50 MB/sec
- SDR104: 1.8V signaling, frequency up to 208
MHz, up to 104 MB/sec
- DDR50: 1.8V signaling, frequency up to 50
MHz, sampled on both clock edges, up to 50
MB/sec
 Flash Interface

Supports the ONFI 2.x Interface specification
and standard command set

Supports Toggle Mode NAND

Dual channel 8-bit flash interface

8 CE pins support 8/16 flash chips (dies)

Supports 1- or 2--way interleave operation per
channel

Global Wear Leveling

Configurable BCH ECC engine

Supports 128/256/384/512/768 page blocks

Supports 3.3V/1.8V flash for all flash vendors
including Hynix, Micron/Intel, Samsung and
Toshiba/SanDisk

Supports various MLC/TLC flash types:
- Hynix 32/26/2ynm MLC/TLC flash
- Micron/Intel 32/25/2ynm MLC/TLC flash
- Samsung 27nm and 2ynm MLC/TLC flash
- Toshiba/SanDisk 43 and 32/2ynm MLC flash
SD 3.0x Host
Controller
SD 3.0x
Interface
D-RAM
(64.5 KB)
Flash Interface
(Configurable
ECC)
P-RAM
(24 KB)
P-ROM
(32 KB) Micro
Processor
NAND
Flash
NAND
Flash