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发表于 2012-8-4 22:30:06
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ti官网上面对tas1020这样描述,我节选了相关部分:
The TAS1020B integrated circuit (IC) is a universal serial bus (USB) peripheral interface device designed specifically for applications that require isochronous data streaming.
An on-chip phase lock loop (PLL) and adaptive clock generator (ACG) provide support for the USB synchronization modes, which include asynchronous, synchronous and adaptive.
他这里说到芯片内部的ppl和时钟发生器可以支持多种同步模式,包括同步和异步,但不去开发支持异步模式的驱动而是靠系统自带的那些应该是没法直接实现异步的。异步功能仅是芯片的一个可支持功能,但arce没有拿出真正的异步支持却用此作为卖点。 |
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