Probe Cable; Break Signal Input - Oki Dr.63514 User Manual

2.7 Probe Cable

The emulator's probe cable carries the following six signals.
• Break (EXT.BRK) input
• Sync out (SYNC.OUT) output
• Trace (PROBE0 to PROBE3) inputs

2.7.1 Break Signal Input

If external breaks are enabled, a rising edge in this signal produces a break request.
EXT.BRK
(Probe cable)
A built-in voltage conversion circuit converts the break (EXT.BRK) input level of VDD, the port interface
power supply voltage (0.9 to 5.5 V), to the internal "H" level.
The break request coincides with the beginning of an instruction S2 cycle.
System clock
M1S00
EXT.BRK
External
break request
+
-
51KΩ
1/2 VDD
Figure 2-11 Break Signal Input
M1 M1
S1 S2 S1 S2
Figure 2-12 External Break Input Timing
Rising edge
detection
circuit
M2 M1
S1 S2 S1 S2
External break occurs
Chapter 2. Functions
External
break request
M1
S1
2-33