82P2281PFG IDT, Integrated Device Technology Inc, 82P2281PFG Datasheet - Page 126

• Manufacturer Part Number: 82P2281PFG
• Manufacturer: IDT, Integrated Device Technology Inc

Specifications of 82P2281PFG

• Number Of Transceivers: 1
• Screening Level: Industrial
• Mounting: Surface Mount
• Package Type: TQFP
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Lead Free Status / RoHS Status: Compliant

T1/J1 Transmit Jitter Attenuation Configuration (021H)
TJITT_TEST:
rent interval between the read and write pointer of the FIFO will be written into the TJITT[6:0] bits (b6~0, T1/J1-038H).
rent interval is compared with the old one in the TJITT[6:0] bits (b6~0, T1/J1-038H) and the larger one will be indicated by the TJITT[6:0] bits (b6~0,
T1/J1-038H); otherwise, the value in the TJITT[6:0] bits (b6~0, T1/J1-038H) will not be changed.
TJA_LIMT:
of the JA can be widened to track the short term input jitter, thereby avoiding data corruption. This bit selects whether the bandwidth is normal or wid-
ened.
bits window.
TJA_E:
TJA_DP[1:0]:
TJA_BW:
Programming Information
IDT82P2281
Bit Name
Default
Bit No.
= 0: The real time interval between the read and write pointer of the FIFO is indicated in the TJITT[6:0] bits (b6~0, T1/J1-038H). That is, the cur-
= 1: The peak-peak interval between the read and write pointer of the FIFO is indicated in the TJITT[6:0] bits (b6~0, T1/J1-038H). That is, the cur-
When the read and write pointer of the FIFO are within 2/3/4 bits (corresponding to the FIFO depth) of overflowing or underflowing, the bandwidth
= 0: Normal bandwidth is selected.
= 1: Widen bandwidth is selected. In this case, the JA will not attenuate the input jitter until the read/write pointer’s position is outside the 2/3/4
= 0: Disable the Transmit Jitter Attenuator.
= 1: Enable the Transmit Jitter Attenuator.
These two bits select the Jitter Attenuation Depth.
= 00: The Jitter Attenuation Depth is 128-bit.
= 01: The Jitter Attenuation Depth is 64-bit.
= 10 / 11: The Jitter Attenuation Depth is 32-bit.
This bit select the Jitter Transfer Function Bandwidth.
= 0: 5 Hz.
= 1: 1.26 Hz.
Type
7
Reserved
6
TJITT_TEST
R/W
5
0
TJA_LIMT
126
R/W
4
0
SINGLE T1/E1/J1 LONG HAUL / SHORT HAUL TRANSCEIVER
TJA_E
R/W
3
0
TJA_DP1
R/W
2
0
TJA_DP0
R/W
1
0
August 20, 2009
TJA_BW
R/W
0
0