Renesas Single-Chip Microcomputer M34519T-MCU - Manual (Page 30)

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System clock
XIN
External trigger
signal TRIG
Instruction Next Instruction
Figure 4.3 Latch timing of the external trigger signal
(2) External trigger signal input characteristics
Trigger breaks work according to the conditions (leading edge/trailing edge) of signals input from
the external trigger cable. External trigger signals of trace points and break points use the same
signals. The input characteristics of external trigger signals are shown in Table 4.4 below. See the
table before using external trigger signals.
Table 4.4 External trigger signal input characteristics
4.10 External Trigger Signal
(1) External trigger signal input timing
The latch timing of the external trigger signal is shown in Figure 4.3.
4.11 Other Precautions
With the M34519T-MCU, you cannot evaluate systems that use some functions as described below.
In such a case, therefore, the system needs to be evaluated using an evaluation-purpose MCU (OTP
version).
(1) Because an emulation circuit exists in the RESET pin, systems that use RESET output cannot be
evaluated.
(2) Because the M34519T-MCU has its power supply voltage fixed at 3 V or 5 V, systems that use
a power-down detect function cannot be evaluated. Therefore, results of A-D conversions may
be different from expected values.
(3) Power-on reset operation cannot be verified.
(4) Because the M34519T-MCU is clocked by the system clock on the board, its clock source cannot
be changed to an on-chip oscillator, CR or crystal oscillator. When using an emulator, do not use
the CMCK, CRCK and CYCK instructions in a program.
(5) With the M34519T-MCU, you cannot use the SRST instruction. When it is used, it will be
executed as a NOP instruction.
Item
H-level voltage
L-level voltage
VIH
VIL
Symbol Voltage
VCC = 2.0 V
VCC = 4.5 V
VCC = 2.0 V
VCC = 4.5 V
Min.
1.5 V
3.15 V
-
-
Max.
-
-
0.5 V
1.35 V