IDT82P2284 Integrated Device Technology, Inc., IDT82P2284 Datasheet - Page 137

• Manufacturer Part Number: IDT82P2284
• Description: 4 Channel T1/J1/E1 Transceiver
• Manufacturer: Integrated Device Technology, Inc.

IDT82P2284
T1/J1 Transmit Configuration 4 (026H, 126H, 226H, 326H)
WDAT[6:0]:
SAMP[3:0] bits (b3~0, T1/J1-025H,...).
T1/J1 Receive Jitter Attenuation Configuration (027H, 127H, 227H, 327H)
RJITT_TEST:
current interval between the read and write pointer of the FIFO will be written into the RJITT[6:0] bits (b6~0, T1/J1-039H,...).
current interval is compared with the old one in the RJITT[6:0] bits (b6~0, T1/J1-039H,...) and the larger one will be indicated by the RJITT[6:0] bits
(b6~0, T1/J1-039H,...); otherwise, the value in the RJITT[6:0] bits (b6~0, T1/J1-039H,...) will not be changed.
RJA_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.
RJA_E:
RJA_DP[1:0]:
RJA_BW:
Programming Information
Bit Name
Bit Name
Default
Bit No.
Default
Bit No.
Type
These bits contain the data to be stored in the pulse template RAM which is addressed by the UI[1:0] bits (b5~4, T1/J1-025H,...) and the
= 0: The real time interval between the read and write pointer of the FIFO is indicated in the RJITT[6:0] bits (b6~0, T1/J1-039H,...). That is, the
= 1: The peak-peak interval between the read and write pointer of the FIFO is indicated in the RJITT[6:0] bits (b6~0, T1/J1-039H,...). That is, the
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 Receive Jitter Attenuator.
= 1: Enable the Receive 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
Reserved
7
7
Reserved
WDAT6
R/W
6
0
6
WDAT5
RJITT_TEST
R/W
5
0
R/W
5
0
WDAT4
R/W
RJA_LIMT
4
0
126
R/W
4
0
QUAD T1/E1/J1 LONG HAUL / SHORT HAUL TRANSCEIVER
WDAT3
R/W
3
0
RJA_E
R/W
3
0
WDAT2
RJA_DP1
R/W
2
0
R/W
2
0
WDAT1
RJA_DP0
R/W
1
0
R/W
1
0
March 22, 2004
RJA_BW
WDAT0
R/W
R/W
0
0
0
0