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Figure 2.3 [Window trace] Page
Notes: 1. When the [L-bus] or [I-bus] radio button is selected, the following bus cycles will be
traced.
•
L-bus: A bus cycle generated by the CPU is acquired. A bus cycle is also acquired
when the cache has been hit.
•
I-bus: A bus cycle generated by the CPU or DMA is acquired. A bus cycle is not
acquired when the cache has been hit. The address information acquired by the I-
bus is 28 bits and the upper 4 bits are displayed as ‘*’. The source cannot be
displayed in the [Trace] window.
When U-RAM or X/Y-RAM is accessed from the P0 space, the I-bus must be selected,
and when accessed from the P2 space, the L-bus must be selected. When a cache fill
cycle is acquired, I-bus must be selected.
2. Address setting when X/Y-bus is selected
To trace both the X/Y-bus when the X/Y-bus is accessed at the same time, the X-bus
condition must be set in channel A, and the Y-bus condition must be set in channel B.
