CMX602BD4 MX-COM, Inc., CMX602BD4 Datasheet - Page 9

• Manufacturer Part Number: CMX602BD4
• Description: Calling line identifier plus call waiting
• Manufacturer: MX-COM, Inc.

Calling Line Identifier plus Call Waiting (Type II)
Note: If enabled, the Data Retiming block will interpret the FSK Channel Seizure signal (a sequence of
4.7 FSK Data Without Retiming
If the Data Retiming facility is not required, the RXCLK input to the CMX602B should continuously be kept
high. The asynchronous data from the FSK Demodulator is then connected directly to the RXD output pin
and the IRQ output will not be activated by the FSK signal. This case is illustrated in Figure 8.
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Output of FSK Demod:
2000 MX-COM, Inc
FSK Demod output:
t
D
alternating mark and space bits) as valid received characters, with values of 55 (hex). Similarly it may
interpret speech or other signals as random characters.
= Internal CMX602B delay (max 1 S); t
RXCLK input:
RXD output:
RXD output:
IRQ output:
RXCLK
Figure 8: FSK Operation without Data Retiming (RXCLK always high)
RXD
IRQ
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START
START
Figure 7: FSK Operation with Data Retiming
START
t
D
1
1
1
CLO
2
2
t
Data Bit 1
D
2
= RXCLK low time (min 1 S); t
Received Character 'n'
3
3
Received Character 'n'
3
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4
4
t
D
4
t
CLO
5
5
5
6
6
Data Bit 2
6
t
CHI
7
7
CHI
CMX602B PRELIMINARY INFORMATION
7
= RXCLK high time (min 1 S)
8
8
8
1
STOP
STOP
STOP
Retimed data bits from
received character 'n'
Doc. # 20480204.002
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