USB2231/USB2232 is the 5th generation Hi-Speed USB Flash Media and CIR controller with integrated card power FETs from SMSC, supporting all popular CIR formats.
This document is a technical datasheet for the SMSC USB2231 and USB2232 chips. These are 5th Generation Hi-Speed USB Flash Media and Consumer IR (CIR) controllers designed to interface various storage cards, such as SmartMedia, xD Picture Card, Memory Stick, SD, MMC, and CompactFlash, with a host system via the USB bus.
The device features an integrated power FET for supplying flash media card power, supporting both bus-powered and self-powered operation. It includes 12 GPIOs for special functions like LED indicators and button inputs, supports SmartDetach technology, and contains on-chip firmware to read and write High Speed Memory Stick attributes.
| Internal SRAM for CIR Controller | 12K Bytes |
|---|---|
| Internal SRAM for general purpose scratchpad | 768 Bytes |
| Bi-directional Bulk Endpoint Buffers | Two, 512 Byte |
| Internal Code Space | 76K Byte or Optional 128K Byte |
| On-Chip Crystal Driver Circuit Frequency | 24Mhz |
| External Clock Source Support | 48MHz |
| On-Chip Regulator Voltage | 1.8V |
| I/O Voltage | 3.3 Volt |
| Package Type | 128 Pin TQFP |
Yes, it features a BIOS Internal PLL for 480Mhz Hi-Speed USB Sampling.
Yes, it is compatible with Microsoft WinXP, WinME, Win2K.