EM91865A EMC [ELAN Microelectronics Corp], EM91865A Datasheet - Page 8

• Manufacturer Part Number: EM91865A
• Description: 13 MEMORY TONE/PULSE DIALER WITH HF, HD, REDIAL AND VOLUME CONTROL FUNCTION
• Manufacturer: EMC [ELAN Microelectronics Corp]

OPERATING FLOW CHART
* This specification are subject to be changed without notice.
Truth Table :
Note : Z= floating (high impedance) ; H= logic "High" ; L= logic "Low" level.
Operating state
(1)On-hook, idle state
(2)Off-hook line
(3)Off-hook, HF line
(4)On-hook, HF line
(5)Off-hook, HD line
(6)On-hook, HD line
@ = To doing R-option
<Note> : HF=Handfree
HD
HF
On_Hook
On_Hook
state
HD
HD
HF
(4)
(6)
HF
HKS
13 MEMORY TONE/PULSE DIALER WITH HF, HD, REDIAL
HF
H
H
H
L
L
L
HKS=H
HD=Hold
Input / Output pin level
HD
PO
Z
Z
Z
Z
Z
Z
Off_Hook
(1) On_Hook
HKS=L
(3)
HF
HKS=H
HKS=L
state
HKS=H
XMUTE
AND VOLUME CONTROL FUNCTION
HF
H
H
L
L
L
L
HF
HF
HKS=L
Off_Hook
Off_Hook
state
HD
(2)
(5)
HFO
HD
H
H
L
L
L
L
HD
HDO
H
H
L
L
L
L
4.28.1999
EM91865
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