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5 relationship between ce reset and power-on reset – NEC PD17062 User Manual

Page 180

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180

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PD17062

14.5 RELATIONSHIP BETWEEN CE RESET AND POWER-ON RESET

When supply voltage is first turned on, power-on reset and CE reset may be applied simultaneously.

Sections 14.5.1 through 14.5.3 describe this reset operation.

Section 14.5.4 describes the cautions when supply voltage rises.

14.5.1 When V

DD

Pin and CE Pin Rise Simultaneously

Fig. 14-6 (a) shows the reset operation. Power-on reset starts the program from address 0000H.

14.5.2 When CE Pin Raised in Forced Halt State Caused by Power-on Reset.

Fig. 14-6 (b) shows the reset operation. Power-on reset starts the program from address 0000H, as in Section

14.5.1.

14.5.3 When CE Pin Raised after Power-on Reset

Fig. 14-6 (c) shows the reset operation. Power-on reset starts the program from address 0000H. CE reset

restarts the program from address 0000H at the rising edge of the next timer carry FF set signal.