7733 datasheet(361/940 Pages) RENESAS

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RESET

7733 Group User’s Manual

13–10

VCC

RESET

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4.5V

0.9V

Note: For the low voltage version, refer to Figure 18.3.1.

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13.1.4 Time required for applying “L” level to pin RESET

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Time required for applying “L” level to pin RESET varies according to the main clock oscillation circuit’s

state.

sThe case where an oscillator is stably oscillating or an external clock is stably input from pin XIN

Apply “L” level for 2

µs or more.

sThe case where an oscillator is not stably oscillating (including the cases where power-on reset is applied

and where the microcomputer operates in the stop mode)

Apply “L” level until oscillation is stabilized.

The time required for stabilizing oscillation varies according to the oscillator. For details, contact with the

oscillator manufacturer.

Figure 13.1.8 shows power-on reset conditions. Figure 13.1.9 shows an example of a power-on reset

circuit.

g For the stop mode, refer to chapter “11. STOP MODE AND WAIT MODES.” For clocks, refer to chapter

“14. CLOCK GENERATING CIRCUIT.”

13.1 Hardware reset

Fig. 13.1.8 Power-on reset conditions

7733 Datasheet(PDF) 361 Page - Renesas Technology Corp