DS2156L+ Maxim Integrated Products, DS2156L+ Datasheet - Page 78
DS2156L+
Manufacturer Part Number
DS2156L+
Description
IC TXRX T1/E1/J1 1-CHIP 100-LQFP
Manufacturer
Maxim Integrated Products
Datasheet
1.DS2156L.pdf
(265 pages)
Specifications of DS2156L+
Function
Single-Chip Transceiver
Interface
E1, J1, T1, TDM, UTOPIA II
Number Of Circuits
1
Voltage - Supply
3.14 V ~ 3.47 V
Current - Supply
75mA
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
100-LQFP
Includes
BERT Generator and Detector, CMI Coder and Decoder, HDLC Controller
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power (watts)
-
- Current page: 78 of 265
- Download datasheet (2Mb)
12.
Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bit 0/Framer Loopback (FLB). This loopback is useful in testing and debugging applications. In FLB, the
DS2156 loops data from the transmit side back to the receive side. When FLB is enabled, the following occurs:
1)
2)
3)
Bit 1/Payload Loopback (PLB). When PLB is enabled, the following occurs:
1)
2)
3)
4)
Bit 2/Remote Loopback (RLB). In this loopback, data input by the RPOSI and RNEGI pins is transmitted back to
the TPOSO and TNEGO pins. Data continues to pass through the receive-side framer of the DS2156 as it would
normally. Data from the transmit-side formatter is ignored. See Figure 2-1 for more details.
T1 Mode: An unframed all-ones code is transmitted at TPOSO and TNEGO.
E1 Mode: Normal data is transmitted at TPOSO and TNEGO.
Data at RPOSI and RNEGI is ignored.
All receive-side signals take on timing synchronous with TCLK instead of RCLKI.
Data is transmitted from the TPOSO and TNEGO pins synchronous with RCLK instead of TCLK.
All the receive side signals continue to operate normally.
Data at the TSER, TDATA, and TSIG pins is ignored.
The TLCLK signal becomes synchronous with RCLK instead of TCLK.
LOOPBACK CONFIGURATION
Please note that it is not acceptable to have RCLK connected to TCLK during this loopback because this
causes an unstable condition.
0 = loopback disabled
1 = loopback enabled
0 = loopback disabled
1 = loopback enabled
T1 Mode. Normally, this loopback is only enabled when ESF framing is being performed but can also be
enabled in D4 framing applications. In a PLB situation, the DS2156 loops the 192 bits of payload data
(with BPVs corrected) from the receive section back to the transmit section. The FPS framing pattern,
CRC6 calculation, and the FDL bits are not looped back; they are reinserted by the DS2156.
E1 Mode. In a PLB situation, the DS2156 loops the 248 bits of payload data (with BPVs corrected) from
the receive section back to the transmit section. The transmit section modifies the payload as if it was input
at TSER. The FAS word; Si, Sa, and E bits; and CRC4 are not looped back; they are reinserted by the
DS2156.
0 = loopback disabled
1 = loopback enabled
—
7
0
—
LBCR
Loopback Control Register
4Ah
6
0
—
5
0
LIUC
4
0
78 of 265
LLB
3
0
RLB
2
0
PLB
1
0
FLB
0
0
Related parts for DS2156L+
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Ds2156, Ds2156l, Ds2156ln T1/e1/j1 Single-chip Transceiver Tdm/utopia Ii Interface
Manufacturer:
Maxim Integrated Products, Inc.
Datasheet:
Part Number:
Description:
MAX7528KCWPMaxim Integrated Products [CMOS Dual 8-Bit Buffered Multiplying DACs]
Manufacturer:
Maxim Integrated Products
Datasheet:
Part Number:
Description:
Single +5V, fully integrated, 1.25Gbps laser diode driver.
Manufacturer:
Maxim Integrated Products
Datasheet:
Part Number:
Description:
Single +5V, fully integrated, 155Mbps laser diode driver.
Manufacturer:
Maxim Integrated Products
Datasheet:
Part Number:
Description:
VRD11/VRD10, K8 Rev F 2/3/4-Phase PWM Controllers with Integrated Dual MOSFET Drivers
Manufacturer:
Maxim Integrated Products
Datasheet:
Part Number:
Description:
Highly Integrated Level 2 SMBus Battery Chargers
Manufacturer:
Maxim Integrated Products
Datasheet:
Part Number:
Description:
Current Monitor and Accumulator with Integrated Sense Resistor; ; Temperature Range: -40°C to +85°C
Manufacturer:
Maxim Integrated Products
Part Number:
Description:
TSSOP 14/A°/RS-485 Transceivers with Integrated 100O/120O Termination Resis
Manufacturer:
Maxim Integrated Products
Part Number:
Description:
TSSOP 14/A°/RS-485 Transceivers with Integrated 100O/120O Termination Resis
Manufacturer:
Maxim Integrated Products
Part Number:
Description:
QFN 16/A°/AC-DC and DC-DC Peak-Current-Mode Converters with Integrated Step
Manufacturer:
Maxim Integrated Products
Part Number:
Description:
TDFN/A/65V, 1A, 600KHZ, SYNCHRONOUS STEP-DOWN REGULATOR WITH INTEGRATED SWI
Manufacturer:
Maxim Integrated Products
Part Number:
Description:
Integrated Temperature Controller f
Manufacturer:
Maxim Integrated Products
Part Number:
Description:
SOT23-6/I°/45MHz to 650MHz, Integrated IF VCOs with Differential Output
Manufacturer:
Maxim Integrated Products
Part Number:
Description:
SOT23-6/I°/45MHz to 650MHz, Integrated IF VCOs with Differential Output
Manufacturer:
Maxim Integrated Products
Part Number:
Description:
EVALUATION KIT/2.4GHZ TO 2.5GHZ 802.11G/B RF TRANSCEIVER WITH INTEGRATED PA
Manufacturer:
Maxim Integrated Products