Abstract: A method for multiple memory aliasing for a configurable system-on-a-chip, including executing code from an internal memory, locating a configuration program in the internal memory, disabling the internal memory alias, and jumping to a secondary initialization routine, is disclosed.

Abstract: The present invention provides a method for breakpoint stepping a multi-bus device. The multi-bus device includes a breakpoint unit capable of detecting bus events on multiple busses. The breakpoint unit is originally programmed to break on the detection of a specified bus event on a bus selected from multiple busses. After the specified bus event has been detected and the device has entered one of several possible frozen states, the breakpoint unit may be programmed to detect a new bus event on a bus selected from multiple busses. The method is repeated as needed to achieve breakpoint stepping, including single stepping.

Abstract: An integrated circuit including a processor, a processor bus coupled to the processor, a system bus and a trace buffer. The trace buffer may capture activity on either the processor bus or the system bus.

Abstract: A method of communicating with a configurable system-on-chip via a test interface is described. First, an interface is coupled to a configurable system-on-chip and a first command is sent to the interface from a tester. The next command execution is then blocked. Next, the first command is executed in the configurable system-on-chip. Data is then output from the configurable system-on-chip and written to a register in the interface. The data output includes a ready bit. Next, the data from the register is read. The first bit read is an asserted ready bit. The next command execution is then enabled. When the asserted ready bit is received in the tester, the tester sends a second command to the interface. The second command is then executed in the configurable system-on-a-chip.