USB2231/USB2232
5th Generation Hi-Speed
USB Flash Media and
CIR Controller with
Integrated Card Power
FETs
Datasheet
PRODUCT FEATURES
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768 Bytes of internal SRAM for general purpose
scratchpad or program execution while re-flashing
external ROM
Two, Double Buffered Bulk Endpoints
Two, Bi-directional 512 Byte Buffers for Bulk Endpoints
64 Byte RX Control Endpoint Buffer
CIR Controller
Consumer IR (CIR) Controller with support for all
popular CIR formats.
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Flash Media Controller
Complete System Solution for interfacing
SmartMediaTM (SM) or xD Picture CardTM (xD)1,
Memory StickTM (MS), High Speed Memory Stick
(HSMS), Memory Stick PRO (MSPRO), MS DuoTM
Secure Digital (SD), High Speed SD, Mini-Secure
Digital (Mini-SD), TransFlash (SD),
64 Byte TX Control Endpoint Buffer
Internal or External Program Memory Interface
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76K Byte Internal Code Space or Optional 128K Byte
External Code Space using Flash, SRAM or EPROM
memory.
MultiMediaCardTM (MMC), Reduced Size
MultiMediaCard (RS-MMC), NAND Flash, Compact
FlashTM (CF) and CF UltraTM I & II, and CF form-
factor ATA hard drives to Hi-Speed USB
On Board 24Mhz Crystal Driver Circuit
Can be clocked by 48MHz external source
On-Chip 1.8V Regulator for Low Power Core
Operation
Internal PLL for 480Mhz Hi-Speed USB Sampling,
Configurable MCU clock
Supports firmware upgrade via USB bus if “boot
block” Flash program memory is used
12 GPIOs for special function use: LED indicators,
button inputs, power control to memory devices, etc.
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Supports USB Bulk Only Mass Storage Compliant
Bootable BIOS
Support for simultaneous operation of all above
devices. (only one at a time of each of the following
groups supported: CF or ATA drive, SM or XD or
NAND, SD or MMC)
On-Chip 4-Bit High Speed Memory Stick and MS
PRO Hardware Circuitry
On-Chip firmware reads and writes High Speed
Memory Stick and MS PRO
1-bit ECC correction performed in hardware for
maximum efficiency
Hardware support for SD Security Command
Extensions
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Inputs capable of generating interrupts with either edge
sensitivity
Attribute bit controlled features:
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Activity LED polarity/operation/blink rate
Full or Partial Card compliance checking
Bus or Self Powered
LUN configuration and assignment
Write Protect Polarity
SmartDetachTM - Detach from USB when no Card
Inserted for Notebook apps
On-chip power FETs with short circuit protection for
supplying flash media card power
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Cover Switch operation for xD compliance
Inquiry Command operation
SD Write Protect operation
Older CF card support
Force USB 1.1 reporting
USB Bus Power Certified
3.3 Volt I/O with 5V input tolerance on VBUS/GPIO3
Complete USB Specification 2.0 Compatibility for Bus
Powered Operation
Internal or External Power FET operation
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Includes Hi-Speed USB Transceiver
A Bi-directional Control and two Bi-directional Bulk
Endpoints are provided.
Compatible with Microsoft WinXP, WinME, Win2K
SP3, Apple OS10, Softconnex, and Linux Multi-LUN
Mass Storage Class Drivers
Win2K, Win98/98SE and Apple OS8.6 and OS9
Multi-LUN Mass Storage Class Drivers available from
SMSC
8051 8 bit microprocessor
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Provides low speed control functions
30 Mhz execution speed at 1 clock per instruction cycle
average
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12K Bytes of internal SRAM for general purpose
scratchpad
128 Pin TQFP Package (1.0mm height, 14mmx14mm
footprint); green, lead-free package also available
1.xD Picture Card not applicable to USB2231
SMSC USB2231/USB2232
DATASHEET
Revision 1.3 (01-12-06)
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