问 CPU Complex

ARM1136JF-S
128 KB L2 unified cache
Jazelle® Java acceleration
Vector floating point coprocessor (VFP)
Smart Speed Switch
Multimedia

VGA MPEG-4 HW encode
Graphics acceleration (i.MX31 only)
Image Processing Unit (IPU)
CMOS/CCD sensor interface
Resize, color space conversion
Deblocking, deringing, blending
Display/TV controller
External Memory Interface (EMI)

SDRAM 16/32-bit, 133 MHz
Mobile DDR 16/32-bit, 266 MHz
NAND Flash 8/16-bit
PSRAM
Advanced Power Management

Automatic Dynamic Voltage and Frequency Scaling (DVFS)
Dynamic Process Temperature Compensation (DPTC)
Active well-bias • Power gating Connectivity
High Speed USB OTG, 2 Hosts
2 x MMC/SD, 2 x Memory Stick ProTM
PCMCIA/CF
ATA-6 (HDD) interface
Audio MUX
IrDA, fast IrDA, keypad
Configuable SPI x 2, SSI/I2S x 2, UART x 5
Performance

CPU complex: starting at 532 MHz
System: 133 MHz @ 1.2V-1.6V (0.9V in Standby mode)
Technology

457 ball, 0.5 mm pitch MAPBGA
90 nm CMOS
答 1: reimx31比imx21多出ATA接口，MPEG4升级至VGA，主频提高到532，内核由ARM926ej-s升级到ARM1136JF-S，功能强大，适合game box等高短多媒体应用，我们公司已经出了imxl和imx21，imx31已在计划中。