NEC Barracuda Service Manual page 27

Barracuda PDA Maintenance
1.2.2.6 W86L388D SD Controller
General Description
The W86L388D is a SD/MMC host interface bridge used between host microprocessor and SD/MMC .
The data width of host microprocessor can be 8-bit W86L388D can support synchronous or asynchronous type
of host interface. It also supports DMA or interrupt type of transfer mode to improve data transfer performance
between host microprocessor and SD/MMC. W86L388D is fit for most of IA devices, such as PDA, Cellular Phone,
DSC, and MP# player.
Features
Compliant with SD spec. Version 1.0
Compliant with MMC spec. Version 2.2
Support two types of host microprocessor interface access-synchronous and
asynchronous mode
DMA and interrupt transfer mode supported
Host microprocessor 8/16 bit data bus
Built-in crystal driver circuit, support external oscillator or crystal clock
Extra 5 programmable GPIO supported
Wide range of clock input from 3.58MHz up to 25MHz
3.3V operation
48-pin LQFP package
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