Epson S5U1C33001H Manual page 8

S5U1C33001H
CPU operating clock
TRG OUT pin output
CPU operating clock
TRG OUT pin output
CPU operating clock
TRG OUT pin output
CPU operating clock
TRG OUT pin output
• TRC IN input pin
This pin inputs an external trace signal. The input signal can also be traced when the bus trace is performed.
• BRK IN input pin
If a low-level signal is input to this pin when the target program is being executed, the target program execution is
suspended. After a low level is input to the BRK IN terminal, a break will occur after a few instructions have been
executed.
Note: Do not apply any voltages other than the following to the BRK IN pin: 0 V (low level), 3.3 to 5.0 V (high level),
or open.
• GND pin
To monitor the signals output from the above pins, connect the GND of a measuring instrument such as an oscilloscope
to this pin. If the ground level between the S5U1C33001H and the target system is unstable (particularly when the 4-pin
cable is used), this pin can be used to stabilize the ground level.
8
(Ver. 4)
Target program is in Stop state.
Trace trigger Trace trigger
point 1 point 2
Trace trigger Trace trigger
point 1 point 1
Trace trigger Trace trigger
point 2 point 1
Figure 8 TRG OUT Output Timing Examples
Trace trigger Trace trigger
point 1 point 2
Target program is in Run state.
Trace trigger Trace trigger
point 1 point 2
Trace trigger Trace trigger
point 2 point 2
Trace trigger Trace trigger
point 2 point 1