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CH2165

HIGH SPEED INTERNET MODEM FAMILY

Cermetek Microelectronics 

Cermetek Microelectronics, Inc.

High Speed Internet Modem Family

• User Name

• Password

• ISP Telephone Number

• Mail Server Address/Name

• Local Email Address

• Destination Email Address

• User Specified Email

Message/Input Port Status

• User ID

User Supplied Parameters

CH21XX

iModem

Product

Family

Internet

(PPP, SMTP, TCP/IP,

POP3)

• Send email

• Retrieve email

• Delete email

Functions Performed

Figure 1. Conceptualized Block Diagram illustrating the Cermetek CH21XX iModem product family

performing the embedded internet application function.

The CH2124/60 products are the first generation

internet enabled devices. These products excel at

sending and retrieving modest amounts of data. Email

messages of approximately 125 ASCII characters in

length can be stored in internal Flash ROM for later

transmission.

The CH2124/60 products are ideal for very low cost

controller applications and in applications where limited

data transfer is required.

OVERVIEW OF THE CH21XX iMODEM

A conceptual representation of the iModem in an

embedded environment is presented in Figure 1. As

can be seen in this figure, the iModem requires the

input of various internet parameters to function

properly: user name, user ID, user password, ISP

telephone number, ISP mail server address/name, local

email address/name, destination email address and

user specified email message/input port status.

Cermetek’s iModem products provide the user with the

ability to assign a unique unit name to each iModem

thereby creating a customized identity for each system

containing an iModem product.

Each iModem device stores the user-supplied

parameters in internal memory. These parameters are

retained when power is removed. The user supplied

parameters are loaded into the iModem via the

iModem’s serial interface port utilizing either

Cermetek’s iNetWizard® telecommunications software

package or, alternatively, one of a variety of

commercially available terminal emulation software

packages. iNetWizard® is available free of charge and

runs on any standard PC operating Microsoft Windows.

Internet Connectivity. The CH21XX iModem uses the

user supplied parameters to establish an internet

connection and then send, retrieve and/or delete email.

After completion of the required internet activities, the

iModem terminates the internet connection.

Send, Retrieve and Delete Email: CH2165. The

CH2165 has the ability to send and retrieve emails of

virtually unlimited length by employing a technique

referred to as streaming email. Once in streaming

email mode, the user simply continues to supply data to

the CH2165’s serial port, and terminates the data

stream with a <CR>.<CR>. Alternatively, messages of

finite length can pre-stored locally on the CH2165 in

RAM memory and then sent when needed. The data

stream termination sequence for pre-stored messages

is the CTRL D characters.

The total CH2165 RAM memory available to the user is

approximately 5M bytes. For messages that need to be

stored semi-permanently, the user has access of up to

1M byte of Flash ROM for message storage.

Messages stored in ROM can also be sent when

needed.

When retrieving emails, the user continues to save the

data streaming out of the CH2165’s serial port until a

<CR>.<CR> is received.

Refer to Cermetek Application Note # 325, @T®

Command Set Description and Usage For CH2165

iModem, for more details.

2003 Cermetek Microelectronics, Inc.

Page 2

Document No. 607-0017 Revision H2 (11/03)

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