u4090b-p ATMEL Corporation, u4090b-p Datasheet - Page 19

• Manufacturer Part Number: u4090b-p
• Description: U4090b-p Monolithic Integrated Feature Phone Circuit Emi Improved
• Manufacturer: ATMEL Corporation

7. U4090B-P Control
4741C–CORD–11/05
Table 7-1.
Table 7-2.
Table 7-3.
Logic Level
Logic Level
Logic Level
0 to Z
1 to Z
0 to Z
1 to Z
0
1
0
1
0
Z
1
Selection of TX Mute and Line Impedance
Selection of Earpiece Mute and Answering Machine Mode
Selection of Transmit Mute
IMPSEL
Line impedance = 600
TXA = on
ES = off
Line impedance = 600
TXA = off
ES = on
Line impedance = 900
TXA = off
ES = on
Line impedance = 900
TXA = on
ES = off
MUTR
RA2 = on
RECATT = on
STIS + STIL = on
RA2 = on
RECATT = off
STIS = on, STIL = off
RA2 = off
RECATT = off
STIS = on, STIL = off
AGA off for STIS
RA2 = off
RECATT = on
STIS + STIL = on
MUTX
MIC 1/2 transmit enabled receive enable
AFS = on
AGA = on
TXACL = on
DTMF transmit enabled receive enable
AFS = on
AGA = on
TXACL = on
DTMF transmit enabled
DTMF to receive enable
AFS = off
AGA = off
TXACL = off
MODE
Speech
Transmit-mute
Transmit-mute
Speech
MODE
Speech
For answering machine
For answering machine
Speech + earpeace mute
MODE
Speech
For answering machine
DTMF dialling
U4090B-P
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