CC-2401K2A-CS5 Copeland Communications Inc, CC-2401K2A-CS5 Datasheet - Page 55

• Manufacturer Part Number: CC-2401K2A-CS5
• Description: MODEM 2400BAUD SECURE 5V
• Manufacturer: Copeland Communications Inc

Specifications of CC-2401K2A-CS5

• Data Format: V.21, V.22, V.23, Bell 103
• Baud Rates: 2.4k
• Interface: UART
• Voltage - Supply: 4.2 V ~ 7 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: 539-1009; CC-2401K2A-CS5

SEE (RVC3), Ring Validation Control 3
Reset Settings = 0001_0110 (0x16)
© 2007, Copeland Communications, Inc.
Name
7:4
3:0
Bit
Type
Bit
RMX[3:0]
RTO[3:0]
Name
D7
Ring Timeout.
These bits set when a ring signal is determined to be over after the most recent ring
threshold crossing.
RTO[3:0]
0000
0001
0010
-
-
-
1111
Ring Assertion Maximum Count.
These bits set the maximum ring frequency for a valid ring signal. During ring qualification,
a timer is loaded with the RAS[5:0] field upon a TIP/RING event and decrements at a
regular rate. When a subsequent TIP/RING event occurs, the timer value is compared to
the RMX[3:0] field, and if it exceeds the value in RMX[3:0], the frequency of the ring is too
high, and the ring is invalidated. The difference between RAS[5:0] and RMX[3:0] identifies
the minimum duration between TIP/RING events to qualify as a ring, in binary-coded
increments of 2.0 ms (nominal). A TIP/RING event typically occurs twice per ring tone
period. At 20 Hz, TIP/RING events would occur every 1/(2 x 20 Hz) = 25 ms. To calculate
the correct RMX[3:0] value for a frequency range [f_min, f_max], the following equation
should be used: RMX[3:0] x 2 ms = RAS[5:0] – 2 ms – (1 / (2 x f_max)).
RTO[3:0]
D6
R/W
D5
D4
Page 55 of 66
Data Sheet
D3
D2
RMX[3:0]
Function
R/W
Ring Timeout
80 ms
128 ms
256 ms
1920 ms
D1
CC-2401K2 Datasheet Rev 1.5
D0
CC-2401K2