Hi,
Im working with the AT91RM9200. I am confused about the distinction between the Advanced Peripheral Bus and the Advanced System Bus..what are they used for?
Someone kindly elaborate Thanx Mayank
- posted
19 years ago
AT91: DIfference between APB and ASB?
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- posted
19 years ago
APB is simpler (no burst transfers etc) and slower than the ASB.
Typically APB is used for stuff like UARTs, whereas as ASB will be used for RAM.
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Cheers, Jon
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- posted
19 years ago
"Mayank Kaushik" skrev i meddelandet news: snipped-for-privacy@f14g2000cwb.googlegroups.com...
The ARM AMBA divides the busses into the ASB (Advanced System Bus) which is a 32 bit synchronous pipelined bus, and the APB which is a 16 bit non pipelined bus asynchronous bus. The CPU and memories are on the ASB and most peripherals are on the APB. There is a bridge betweeen the ASB and the APB. The reason for the APB is that the buffering reduces the complexity of peripheral and mimizes the capacitance on the ASB.
The ASB is replaced by the AHB in the AMBA - II architecture.