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W91F820N

13-FLASH MEMORY TON/PULSE DIALER WITH HANDFREE, LOCK AND HOLD FUNCTIONS

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Preliminary W91F820N SERIES

Timing Waveforms, continued

HKS

HFI

H KEY

HFO

T/P MUTE

H/P MUTE

CHIP ENABLE

OFF HOOK

HIGH

Figure 3(b)

Note: The H KEY and HFI inputs will toggle the HFO signal. The first time HFI or H KEY are activated, the HFO signal will go

high and the previous active input will be neglected.

HKS

HFI

H KEY

HFO

T/P MUTE

H/P MUTE

CHIP ENABLE

ON HOOK

HIGH

Figure 3(c)

Note: The HKS signal change of state from high to low will initialize both the HFO and H/P MUTE signals.

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