Hardware Reference
In-Depth Information
Figure 10-3. SABB connection block
SABB by the Code
Possibly the most significant feature of SABB is the scrapping of master/slave topography. This topography is a huge
limitation on a bus, and so for a number of reasons has been engineered out. All devices connected using SABB
share the same code. While only one device can control the data lines at once, each device has the ability to do so.
Note that while SPI allows communication between a master and a slave, the slaves do not have the ability to directly
communicate. This barrier is removed, as there is no slave/master relationship. Any device may communicate to any
other device on the network. Flow control is first determined on a hardware level, and then once the bus is held by a
device, software flow control takes over. The flow control used in Listing 10-4 is limited to the ability of each device to
be addressed.
 
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