DS26519GA2 Maxim Integrated, DS26519GA2 Datasheet - Page 180
![no-image](/images/no-image-200.jpg)
DS26519GA2
Manufacturer Part Number
DS26519GA2
Description
Network Controller & Processor ICs
Manufacturer
Maxim Integrated
Datasheet
1.DS26519GA2.pdf
(310 pages)
Specifications of DS26519GA2
Part # Aliases
90-26519-0A2
- Current page: 180 of 310
- Download datasheet (3Mb)
Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bit 6: u-Law or A-Law Digital Milliwatt Code Select (uALAW)
Bit 5: RSERn Control (RSERC)
Bits 4 and 3: Receive Bit Inversion (BINV[1:0])
Bit 1: Payload Loopback (PLB)
When PLB is enabled, the following will occur:
In a PLB situation, the DS26519 will loop the 192 bits (248 for E1) of payload data (with BPVs corrected) from the
receive section back to the transmit section. The transmitter will follow the frame alignment provided by the
receiver. The receive frame boundary is automatically fed into the transmit section, such that the transmit frame
position is locked to the receiver (i.e., TSYNCn is sourced from RSYNCn). The FPS framing pattern, CRC-6
calculation, and the FDL bits (FAS word, Si, Sa, E bits, and CRC-4 for E1) are not looped back, they are reinserted
by the DS26519 (i.e., the transmit section will modify the payload as if it was input at TSERn).
Bit 0: Framer Loopback (FLB)
This loopback is useful in testing and debugging applications. In FLB, the DS26519 will loop data from the transmit
side back to the receive side. When FLB is enabled, the following will occur:
1) Data will be transmitted on TTIPn and TRINGn synchronous with RCLKn instead of TCLKn.
2) All of the receive-side signals will continue to operate normally.
3) The TCHCLKn and TCHBLKn signals are forced low.
4) Data at the TSERn, TDATAn, and TSIGn pins is ignored.
0 = u-law code is inserted based on T1RDMWE1–3 or E1RDMWE1–4 registers.
1 = A-law code is inserted based on T1RDMWE1–3 or E1RDMWE1–4 registers.
0 = Allow RSERn to output data as received under all conditions (normal operation).
1 = Force RSERn to one under loss of frame alignment conditions.
00 = No inversion.
01 = Invert framing.
10 = Invert signaling.
11 = Invert payload.
0 = Loopback disabled.
1 = Loopback enabled.
0 = loopback disabled
1 = loopback enabled
1) (T1 mode) an unframed all-ones code will be transmitted at TTIPn and TRINGn.
2) Data at RTIPn and RRINGn will be ignored.
3) All receive-side signals will take on timing synchronous with TCLKn instead of RCLKn.
Note that it is not acceptable to have RCLKn tied to TCLKn during this loopback because this will cause an
unstable condition.
(E1 mode) normal data will be transmitted at TTIPn and TRINGn.
—
7
0
RCR3
Receive Control Register 3
083h + (200h x (n - 1)) + (2000h x [(n - 1) / 8]): where n = 1 to 16
uALAW
6
0
RSERC
5
0
180 of 310
BINV1
4
0
BINV0
3
0
DS26519 16-Port T1/E1/J1 Transceiver
—
2
0
PLB
1
0
FLB
0
0
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