ds22-l100-041 Conexant Systems, Inc., ds22-l100-041 Datasheet - Page 28

• Manufacturer Part Number: ds22-l100-041
• Description: Cx84100-41/-23 Scxv.22bis Modem V.22bis Modem With Cx20493 Smartdaa? Line Side Device
• Manufacturer: Conexant Systems, Inc.

Table 3-2. CX84100 V.22bis Modem Pin Signal Definitions
3-4
XTLI
XTLO
RESET#
VDD
VDD_CORE
GND
LPO
RESERVED
DSPKOUT
PWRCLKP
PWRCLKN
DIB_DATAP
DIB_DATAN
Label
1
2
3
7, 22
24
9, 25
23
13, 14,
15, 16,
19
28
26
27
20
21
Pin
CX84100-41/-23 SCXV.22bis Modem Data Sheet
I
O
I
P
P
G
I
O
O
O
I/O
I/0
I/O
Ix
Ox
Itpu
PWR
PWR
GND
Rx
Ot2
It/Odpc
It/Odpc
Idd/Odd
Idd/Odd
I/O Type
Speaker Interface
Conexant
DIB Interface
System
28.224 MHz Crystal Oscillator Input. Crystal oscillator input or
external input pin. When using a crystal oscillator, connect the
crystal between pins 1 and 2. If a crystal is not used, connect this
pin to an external clock through a 100 pF capacitor (see
Figure 3-1).
28.224 MHz Crystal Oscillator Output. When using a crystal
oscillator, connect the crystal between pins 1 and 2. This pin is
left unconnected when an alternative clock source is applied to
XTLI.
Master Reset. The RESET# input resets the CX84100 device
and returns the modem to the factory default values.
When RESET# is at logic 0, it holds the modem in the reset state;
A low-to-high transition releases the modem from the reset state.
After application of VDD, RESET# must be held low for at least
15 ms after the VDD power reaches operating range. The
modem device set is ready to use 25 ms after the low-to-high
transition of RESET#.
The RESET# input is typically connected to a reset switch circuit.
Digital Supply Voltage. Connect to +3.3 V.
Core Voltage. Core Voltage. Internal +1.8 V core voltage for
decoupling. Do not connect this pin to an external +1.8 V power
supply.
Digital Ground. Connect to system ground.
Low Power Oscillator. Connect to +3.3 V through a 240 kΩ
±1% resistor. This enables an internal oscillator to generate a 33
MHz clock for use in low power modes.
Reserved. Connected to internal circuitry. Leave open.
Speaker Digital Output. This signal is the digital output made
from the received analog input signal digitized to TTL levels by an
internal comparator.
Clock and Power Positive. Provides clock and power to the
LSD. Connect to DIB transformer primary winding non-dotted
terminal.
Clock and Power Negative. Provides clock and power to the
LSD. Connect to DIB transformer primary winding dotted
terminal.
Data Positive. Transfers data, control, and status information
between the CX84100 V.22bis Modem and the LSD. Connect to
LSD through DIB data positive channel components.
Data Negative. Transfers data, control, and status information
between the CX84100 V.22bis Modem and the LSD. Connect to
LSD through DIB data negative channel components.
Signal Name/Description
102339C