CC-2401K2A-CS Copeland Communications Inc, CC-2401K2A-CS Datasheet - Page 10

• Manufacturer Part Number: CC-2401K2A-CS
• Description: MODEM 2400BAUD SECURE 3.3V
• Manufacturer: Copeland Communications Inc

Specifications of CC-2401K2A-CS

• Data Format: V.21, V.22, V.23, Bell 103
• Baud Rates: 2.4k
• Interface: UART
• Voltage - Supply: 3 V ~ 3.6 V
• Mounting Type: Surface Mount
• Package / Case: Module
• For Use With: 539-1002 - KIT EVALUATION WORLD MODEM II
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 539-1010; CC-2401K2A-CS

Command / Data Mode
Flow Control
Power Save Modes
© 2007, Copeland Communications, Inc.
On Reset, the CC-2401 is in command mode. In this mode, the modem accepts AT commands. Type
“ATDT#” (tone dial) to initiate a call once the modem has been initialized. Use ATDP for pulse lines. Every
command must be followed by a carriage return. Once a connection is established, the modem responds with
“c, “d”, or “v” and enter data mode. Once in this mode, the modem will not respond to AT style commands.
There are three ways to return to command mode:
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No matter the escape method, when carrier is lost, the modem will return to command mode and reports “N”.
Flow control is only needed if the DTE and DCE rate are not the same. If the DTE rate is set higher than the
line (DCE), flow control is required to prevent data loss to the transmitter.
To control data flow, the CTS pin is used. When CTS is asserted, the CC-2401 is ready to accept a character.
While CTS is negated, no data should be sent to the modem on TXD. To simplify flow control, the CC-2401
has an integrated ten character transmit FIFO and allows for two different CTS reporting methods. By default,
the CTS pin is negated as soon as a start bit is detected on the TXD pin and remains negated until the modem
is ready to accept another character. Setting SFC7[7]=1 (CTSM), CTS is negated when the FIFO is 70% full
and is reasserted when the FIFO is 30% full.
The CC-2401 has three low power modes:
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Use the ESC pin.
return the modem to command mode. To reenter data mode, type “ATO”.
Use 9-bit data mode. If 9-bit data format with escape is configured a 1 detected on bit 9 returns the
modem to command mode. To enable this feature, set SE0[3] (ND) = 1 and S15[0] (NBE) = 1. Again,
use “ATO” to return to data mode.
Use “+++”. The escape sequence is a sequence of three escape characters that are set in S-register S0F
(“+” character is the default escape). If this sequence is seen and the modem detects no activity on the
line before or after, the modem will return to command mode.
DSP Power down. The DSP processor can be powered down by setting SEB[3](PDDE) = 1. In this
mode, the serial interface still functions and the modem detects ringing and intrusion. No modem modes
or tone detection features function.
Wake on Ring. Issuing ATz command causes the modem into a low power mode where both the
controller and DSP are powered down. Only an incoming ring, a low TXD signal, or a total reset will
power up the modem again. Return from wake-on-ring triggers the INT pin if S09[6] (WOR) = 1.
Total Power down. SF1[5] = 1 and SF1[6] = 1 places the modem into total powerdown mode. All logic,
including the crystal, is powered down.
To enable the ESC pin feature, set SE2[5:4) = 11. A positive edge on this pin will
Page 10 of 66
Data Sheet
CC-2401K2 Datasheet Rev 1.5
CC-2401K2