u4091bm-r ATMEL Corporation, u4091bm-r Datasheet - Page 5

• Manufacturer Part Number: u4091bm-r
• Description: Programmable Telephone Audio Processor
• Manufacturer: ATMEL Corporation

Table 2-1.
4872A–CORD–08/05
Note:
Pin
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
1
2
3
4
5
6
7
8
9
1. The protection device at pin RECIN is disconnected.
Pin Description
OSCOUT
SWOUT
RECO2
RECO1
SENSE
IMPSW
RESET
Symbol
TXACL
TSACL
VRING
OSCIN
RECIN
INLDR
COSC
BNMR
INLDT
VMPS
BNMT
SAO2
SAO1
TLDR
MICO
VMIC
TLDT
MIC3
MIC2
MIC1
ADIN
GND
IMPA
VMP
SDA
SCL
IND
INT
VB
ES
CT
VL
Function
Receive amplifier input
Time constant adjustment for transmit anti-clipping
Microphone input for hands-free operation
Input of symmetrical microphone amplifier with high common-mode rejection ratio
Input of symmetrical microphone amplifier with high common-mode rejection ratio
Output of the receive amplifier
Output of the receive amplifier, also used for sidetone network
The internal equivalent inductance of the circuit is proportional to the value of the capacitor at this pin. A
resistor connected to ground may be used to adjust the DC mask
Positive supply-voltage input to the device in speech mode
Input for sensing the available line current
Ground, reference point for DC and AC signals
Unstabilized supply voltage for speech network
Negative output of speaker amplifier (push-pull only)
Positive output of speaker amplifier (single-ended and push-pull operation)
Unregulated supply voltage for the microcontroller (via series regulator to VMP)
Regulated output voltage for supplying the microcontroller (typically 3.3V/6 mA in speech mode)
Reference node for microphone amplifier, supply for electret microphones
Time constant for speaker amplifier anti-clipping
Input for ringer supply
Input for adjusting the ringer input impedance
70-kHz oscillator for ringing power converter
Output for driving the external switch resistor
Interrupt line for serial bus
Clock input for serial bus
Data line for serial bus
Input for 3.58-MHz oscillator
Reset output for the microcontroller
Clock output for the microcontroller
Input for external supply indication
Input of A/D converter
Output of background-noise monitor receive
Output of background-noise monitor transmit
Time constant for mode switching of voice switch
Time constant of receive-level detector
Input of receive-level detector
Input of transmit-level detector
Time constant of transmit-level detector
Switch for additional line impedance
Microphone preamplifier output
(1)
U4091BM-R
5