Z02215
Single Chip Modem with Integrated Controller, Data Pump, and AFE
3
General Description
The Z02215 is a synchronous single-chip V.22bis modem capable of 2400 bps
full-duplex over dial-up lines. It is a full-featured, self-controlled modem that
includes a modem controller, DSP, and Analog Front End (AFE) functions. This
device is specifically designed for use in embedded modem applications where
space, performance, and low-power consumption are key requirements.
Operating over the Public Switched Telephone Network (PSTN), the Z02215
meets the modem standards for V.22bis, V.22, V.23 (Minitel), V.21, Bell 212A, Bell
202, Bell 202T, and Bell 103.
A typical modem can be created by simply adding a phone- line interface (DAA),
and DTE interface.
All modulation, demodulation, filtering, Analog to Digital (A/D), and Digital to Ana-
log (D/A) conversion functions for transmission and reception are provided on-
chip. Automatic compromise equalizers are included to optimize performance
over a wide range of line types.
The Z02215 device compensates for a wide variety of adverse line conditions by
using adaptive equalizers.
The Z02215 provides comprehensive selectable and programmable tone genera-
tion and detection.
Transmit drivers and receive amplifiers can be connected directly to a Data
Access Arrangement (DAA) by adding a transformer, or a silicon DAA, reducing
the external circuits to a minimum.
In addition, the Z02215 provides further system-level savings by providing built-in
filters for both the transmitter analog output and the receiver analog Input. This
configuration eliminates the need for external filtering components.
The analog front end of the Z02215 includes an active hybrid circuit that improves
modem performance and reduces system-level costs by reducing the requirement
for external components.
The Z02215 device operates on a single +5 VDC power supply. During periods of
no traffic, the modem can be placed into SLEEP mode, reducing power consump-
tion through Dynamic Power Management.
Note:
All signals with an
overline
, are active Low. For example, B/
W
,
in which WORD is active Low; and
B
/W, in which BYTE is
active Low.
PS001907-0904
Features
ZILOG [ ZILOG, INC. ]
