EVALUATION BOARD S5U1C62XXXE

6.2 Independent Use of S5U1C62xxxE

This section describes operation when using the S5U1C62xxxE by itself.

The S5U1C62xxxE may be used independently by connecting a power supply to it. Use a 5 V DC regulator (more than 3 A) as an external power supply. Connect it with the correct polarity (+ and -).

(Refer to Section 5.2, "Power Cable Connection".)

6.2.1Power on/off

Before turning the POWER switch of the S5U1C62xxxE on, confirm the following:

(1)The power cable is connected correctly.

(2)The target system is connected correctly.

(3)The ROMs have been installed correctly.

After confirming the above items, turn the POWER switch of the S5U1C62xxxE on using the following proce- dure:

(1)Turn the regulator on. If the regulator is of the variable-voltage type, set the output voltage to 5 V.

(2)Turn the POWER switch of the S5U1C62xxxE on.

Note: To turn the POWER switch of the S5U1C62xxxE off, then on, turn it off, wait for 10 seconds or more, and then turn it on.

After the POWER switch of the S5U1C62xxxE has been turned on, the DONE LED (green) on the top cover lights after several seconds to indicate that debugging may proceed. If the DONE LED is still off 10 seconds or more after the POWER switch has been turned on, do the following:

(1)Turn the POWER switch of the S5U1C62xxxE off.

(2)Confirm that the ROMs have been installed properly, and the cables connected properly.

(3)Check the fuse.

(4)Turn the POWER switch of the S5U1C62xxxE on.

If the DONE LED still does not light, do a self-diagnosis.

For the self-diagnosis method, refer to the "S5U1C62xxxE Manual".

6.2.2Debugging

When the S5U1C62xxxE is used alone, it provides the following debugging functions. The method of operation is given below.

•Program free run

When the RESET switch (on the top cover) is pressed, the S5U1C62xxxE enters the program run state, and executes the application program from page 1, step 0. Before pressing the RESET switch after the power to the S5U1C62xxxE has been switched on, make sure that the DONE LED is lit.

•Program break

The program may be stopped at the address set by the BREAK POINT switches. This function is valid when the EN/DIS switch is in the EN position. The program stops at the program address where the breakpoint is set. It stops before the instruction at the breakpoint is executed. The program may be stopped by pressing the STEP key.

When the program is stopped, the LED indicators for the internal state of the CPU show the current state. So debug by checking this state against the program.

To restart the program after a break, set the next breakpoint, and press the RUN key.

The single-step operation (described below) can be performed by pressing the STEP key instead of the RUN key.

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