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XTAL1

RST

INT

Vclk

RXE

ZLE

asynchronous

(DON = 1)

(1)

(2)

REF

programmed for 32768 Hz

t RSU

t RST

active LOW

active HIGH

active LOW

active HIGH

MLC253

Fig.13 Reset timing.

(1) The RXE output signal is shown for disabled synthesizer. When the synthesizer is enabled RXE is held off until after the second pulse on ZLE (programming complete).

(2) The ZLE output signal is shown for enabled synthesizer and DON = 1. When DON = 0 output ZLE remains HIGH until ON state is entered (DON = 1 or control register bit D4 = 1).