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Renesas M34514T-MCU 5.5 Pullup Transistor Control, 5.4 Watchdog Timer

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Figure 5.1 Waveform output from check pin TP5

5.5 Pullup Transistor Control

Since ports P0 and P1 contain emulation circuits, you can not control the pullup resistors using the

pullup control register PU0. If you want to use the internal pullup resistors, turn on switches SW4 to

SW7 to activate the pullup resistors on the M34514T-MCU board.

The port's resistance value of the pullup resistor (RA1) is 68 kΩ.

5.4 Watchdog Timer

The M34514T-MCU does not have an operational watchdog timer. Therefore, use an evaluation

MCU (OTP version) to verify the operation associated with a watchdog timer.

The M34514T-MCU outputs a signal whose waveform is shown below from the check pin TP5

during WRST instruction execution cycles. This signal allows you to check the initialization cycle

of a watchdog timer.

WRST instruction Next WRST instruction

System clock

XIN

WRST

Contents

Main ( 2 / 42 ) Contents Page Chapter 1. Precautions for Safety WARNING IMPORTANT CAUTION WARNING CAUTION IMPORTANT Notes on Differences between Actual MCU and Emulator: Note on the Target System: Notes on Connecting the Target System: Page 2. Handling Precautions Page 3. Contents of the M34514T-MCU Package 3.1 Things to Check When Unpacking 3.2 Other Necessary Products Page Page Page 4.2 Specifications Table 4.1 lists specifications of M34514T-MCU. Table 4.1 M34514T-MCU Specifications 4.3 Description of Switches Figure 4.3 Positions of switches Table 4.2 Functions of switches (1/2) Table 4.3 Functions of switches (2/2) 4.4 Description of Connectors Figure 4.5 Connector J3 pin layout Page 4.5 Connection to the Target System Figure 4.9 Pin layout of 50-wire normal-pitch cable Table 4.8 50-wire normal-pitch cable pin assignments Page Table 4.9 M34513T-PTCA pin assignments Page Figure 4.12 External view of TQPACK032SA and M34513T-PTCC Table 4.10 TQPACK032SA pin assignments 4.6 LED Page 5. Precautions to Be Taken When Debugging 5.1 Reset 5.2 System Clock 5.3 Real-time Capability of Timer 5.5 Pullup Transistor Control 5.4 Watchdog Timer 5.6 Port I/O Timing 5.7 Port I/O Characteristics 5.8 Power-down Mode 5.9 Program Execution (G, GB) Page 5.10 External Trigger Signal Page Page Page Appendix A. How to Request for Repair CAUTION Note on Transporting the Product: