CC-2401K2A-CS Copeland Communications Inc, CC-2401K2A-CS Datasheet - Page 54

• 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

SED (RVCZ), Ring Validation Control 2
Reset Settings = 0001_1001 (0x19)
© 2007, Copeland Communications, Inc.
Name
7:6
5:0
Bit
Type
Bit
Reserved
RAS[5:0]
Name
D7
Read returns zero.
Ring Assertion Time.
These bits set the minimum 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. If a second or subsequent TIP/RING event occurs after the timer has timed
out, the frequency of the ring is too low, and the ring is invalidated. The difference between
RAS[5:0 and RMX[5:0] 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 RAS[5:0] value for a frequency range
[f_min, f_max], the following equation should be used: RAS[5:0] = 1 / (2 x f_min).
D6
D5
D4
Page 54 of 66
Data Sheet
D3
RAS[5:0]
R/W
D2
Function
D1
CC-2401K2 Datasheet Rev 1.5
D0
CC-2401K2