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Chapter 2. Functions
2-35
2.7.3 Trace Inputs
These inputs are for tracing external signals during real-time emulation.
+
-
+
-
+
-
1/2 VDD
+
-
51K Ω
51K
Ω
51K
Ω
51K
Ω
To trace circuit
PROBE0
PROBE1
PROBE2
PROBE3
(Probe cable)
Figure 2-14 Trace Inputs
Built-in voltage conversion circuits convert the trace (PROBE0 to PROBE3) inputs to the internal “H”
level from VDD, the positive power supply voltage (0.9 to 5.5 V).
Input is latched at the beginning of an instruction S1 cycle.
M1 M1 M2 M1
S1 S2 S1 S2 S1 S2 S1 S2 S1
M1
System clock
Trace write signal
Data capture signal
Trace probe input
Trace memory
probe information
Figure 2-15 Trace Input Timing