DS2149 查看數據表（PDF） - Maxim Integrated
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DS2149 Datasheet PDF : 32 Pages
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CR2 (B010001): Control Register 2
MSb
LSb
RESET PAT1 PAT0
TAIS ENLOOP ALB
LLB
RLB
SYMBOL
RESET
PAT1
PAT0
TAIS
ENLOOP
ALB
LLB
RLB
POSITION
CR2.7
CR2.6
CR2.5
CR2.4
CR2.3
CR2.2
CR2.1
CR2.0
FUNCTION
Resets device states and clears all registers.
Selects output data pattern (Table 4-F).
Selects output data pattern (Table 4-F).
0 = Transmit data normally
1 = Transmit unframed all ones
0 = Disable in-band loop-code detection
1 = Enable in-band loop-code detection
0 = Disable analog loopback
1 = Enable analog loopback
0 = Disable local loopback
1 = Enable local loopback
0 = Disable remote loopback
1 = Enable remote loopback
Table 4-F. Data Pattern Selection
PAT0
0
0
1
1
PAT1
0
1
0
1
DATA SOURCE
TPOS/TNEG
Transmit QRSS
In-band loop-up 00001
In-band loop-down 001
CR3 (B010010): Control Register 3
MSb
JA6HZ TPD
— EQZMON20 EQZMON26
JA128
LSb
LIRST TAOZ
SYMBOL
JA6HZ
TPD
—
EQZMON20
EQZMON26
JA128
LIRST
TAOZ
POSITION
CR3.7
CR3.6
CR3.5
CR3.4
CR3.3
CR3.2
CR3.1
CR3.0
FUNCTION
0 = Set bandwidth of jitter attenuator to 3Hz
1 = Set bandwidth of jitter attenuator to 6Hz; not available if
JA128 = 1
0 = Enable transmitter outputs
1 = Disable transmitter outputs
—
0 = Normal receiver operation
1 = Add 20dB of resistive gain to inbound signal
0 = Normal receiver operation
1 = Add 26dB of resistive gain to inbound signal
0 = Jitter attenuator buffer depth = 32 bits
1 = Jitter attenuator buffer depth = 128 bits
0 = Normal operation
1 = Reset the receive LIU state machine
0 = Disable transmit alternate 1s and 0s
1 = Enable transmit alternate 1s and 0s
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DS2149
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