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Z02205
MODEM CONTROLLER IDEAL FOR LOW POWER
CONSUMPTION, SMALL SIZE REQUIREMENTS
PRODUCT SPECIFICATION
PS001000-MOD0599
ZiLOG WORLDWIDE HEADQUARTERS • 910 E. HAMILTON AVENUE • CAMPBELL, CA 95008
TELEPHONE: 408.558.8500 • FAX: 408.558.8300 • INTERNET: HTTP://WWW.ZILOG.COM

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©1999 by ZiLOG, Inc. All rights reserved. Information in this publication concerning the devices, applica-
tions, or technology described is intended to suggest possible uses and may be superseded. ZiLOG, INC.
DOES NOT ASSUME LIABILITY FOR OR PROVIDE A REPRESENTATION OF ACCURACY OF
THE INFORMATION, DEVICES, OR TECHNOLOGY DESCRIBED IN THIS DOCUMENT. ZiLOG
ALSO DOES NOT ASSUME LIABILITY FOR INTELLECTUAL PROPERTY INFRINGEMENT
RELATED IN ANY MANNER TO USE OF INFORMATION, DEVICES, OR TECHNOLOGY
DESCRIBED HEREIN OR OTHERWISE. Except with the express written approval of ZiLOG, use of
information, devices, or technology as critical components of life support systems is not authorized. No
licenses are conveyed, implicitly or otherwise, by this document under any intellectual property rights.
ii
Z02205
PS001000-MOD0599

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PRODUCT SPECIFICATION
Z02205
1
MODEM CONTROLLER IDEAL FOR LOW POWER
CONSUMPTION, SMALL SIZE REQUIREMENTS
FEATURES
Device
Z02205
ROM
(KB)
16
RAM*
(Bytes)
237
Speed
(MHz)
16
‡ Includes AT command set interpreter in on-chip ROM—
no external memory required
‡ Supports Tone dial or Pulse dial
‡ Call progress monitoring controls
‡ Handshake controls
‡ Guard Tone controls
‡ Line quality monitoring and Auto-Retrain
‡ Auto-Dial and Auto-Answer
‡ Glueless interface to Z02201 modem data pump
‡ Watch-Dog Timer (WDT)/Power-On Reset (POR)
‡ Type-I Caller ID
‡ Dynamic power management
‡ CMOS design for low power consumption
‡ 0°C to +70°C commercial temperature range
‡ 28-pin DIP, SOIC package
‡ 4.5V to 5.5V operating range
GENERAL DESCRIPTION
The Z02205 V.22bis Modem Controller serves as the mo-
dem controller in embedded V.22bis modem applications.
A complete modem can be made by adding ZiLOG data
pump (Z02201), phone line interface, and the required DTE
interface. The Z02205 has been designed for low-cost use
and includes a glueless interface to the ZiLOG data pumps.
The Z02205 is ideal for applications where small size and
low power consumption are requirements.
The Z02205 operates over dial-up telephone connections,
provides auto-dial and ring detect, and operates in either
SYNC or ASYNC modes.
The Z02205 includes AT command and modem control
firmware in on-chip ROM. It also includes enhanced wake-
up circuitry, programmable Watch-Dog Timers (WDT), and
low-noise/EMI options.
AT commands stored on-chip in ROM provide control over
the following modem controller functions:
‡ Call progress monitoring
‡ Handshake negotiation
‡ Dial controls—pulse or tone
‡ S-registers
‡ Auto-answer and auto-dial
‡ Guard tones
‡ On-hook and off-hook
‡ Auto-retrain
Standard Z02205 sample devices and demonstration boards
contain controller code tailored for operation on the North
American phone network. For production usage, customers
must modify the controller code to meet the requirements
of their particular country and application.
PS001000-MOD0599
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Modem Controller
ZiLOG
Note: All signals with an overline, are active Low. For exam-
ple, B/W, in which WORD is active Low; and B/W, in
which BYTE is active Low.
Power connections follow conventional descriptions be-
low:
Connection
Power
Ground
Circuit
VCC
GND
Device
VDD
VSS
Parallel
Line
Interface
Data
Z02205
Z02201
or
Access
Arrangement
DTE
Controller
Serial
Z02922
Data Pump
Speaker
Eye Pattern
Interface
Optional
Optional
Oscilloscope
Optional
Figure 1. Functional Block Diagram
Telephone
Line
D5
D6
D7
DPRD
DPWR
DPRESET
MUTE
VCC
XTAL2
XTAL1
DPIRQ
RINGDET
DTR
DCD
1
14
Z02205
28 D4
D3
D2
D1
D0
DPCS
GND
A2
A1
A0
RxD
OH
TxD
15 SHUNT
Figure 2. Z02205 Pin Diagram (SOIC/ DIP)
2 PS001000-MOD0599

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ZiLOG
PIN DESCRIPTION
Pin #
1–3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19–21
22
23
24–28
Symbol
D5–D7
DPRD
DPWR
DPRESET
MUTE
VCC
XTAL2
XTAL1
DPIRQ
RINGDET
DTR
DCD
SHUNT
TxD
OH
RxD
A0–A2
GND
DPCS
D0–D4
Table 1. Z02205 Pin Identification
Function
DSP Register Data Lines 5 through 7
Data Pump Read
Data Pump Write
Data Pump Reset
Speaker Mute
Power Supply
Crystal Oscillator
Crystal Oscillator
Data Pump Interrupt Request
Ring Detect Input
Data Terminal Ready
Data Carrier Detect
Pulse Dial Shunt Relay Output
Data Transmit
Off Hook Relay Output
Data Receive
DSP Register Address Lines 0 through 2
Ground
Data Pump Chip Select
DSP Register Data Lines 0 through 4
Z02205
Modem Controller
Direction
In/Output
Output
Output
Output
Output
Output
Input
Input
Input
Input
Output
Output
Output
Output
Input
Output
Output
In/Output
PS001000-MOD0599
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