DS21458LDK Maxim Integrated, DS21458LDK Datasheet - Page 119
DS21458LDK
Manufacturer Part Number
DS21458LDK
Description
Network Controller & Processor ICs
Manufacturer
Maxim Integrated
Datasheet
1.DS21458LDK.pdf
(269 pages)
- Current page: 119 of 269
- Download datasheet (2Mb)
DS21455/DS21458 Quad T1/E1/J1 Transceivers
20.1 Receive Side
See the IOCR1 and IOCR2 registers for information on clock and I/O configurations.
If the receive-side elastic store is enabled, then the user must provide either a 1.544MHz or 2.048MHz
clock at the RSYSCLK pin. For higher rate system-clock applications, see the Interleaved PCM Bus
Operation section. The user has the option of either providing a frame/multiframe sync at the RSYNC pin
or having the RSYNC pin provide a pulse on frame/multiframe boundaries. If signaling reinsertion is
enabled, signaling data in TS16 is realigned to the multiframe-sync input on RSYNC. Otherwise, a
multiframe-sync input on RSYNC is treated as a simple frame boundary by the elastic store. The framer
will always indicate frame boundaries on the network side of the elastic store via the RFSYNC output
whether the elastic store is enabled or not. Multiframe boundaries will always be indicated via the
RMSYNC output. If the elastic store is enabled, then RMSYNC will output the multiframe boundary on
the backplane side of the elastic store.
20.1.1 T1 Mode
If the user selects to apply a 2.048MHz clock to the RSYSCLK pin, then the data output at RSER will be
forced to all ones every fourth channel and the F-bit will be passed into the MSB of TS0. Hence, channels
1 (bits 1–7), 5, 9, 13, 17, 21, 25, and 29 (time slots 0 (bits 1–7), 4, 8, 12, 16, 20, 24, and 28) will be forced
to a one. Also, in 2.048MHz applications, the RCHBLK output will be forced high during the same
channels as the RSER pin. This is useful in T1 to E1 conversion applications. If the two-frame elastic
buffer either fills or empties, a controlled slip will occur. If the buffer empties, then a full frame of data
will be repeated at RSER and the SR5.0 and SR5.1 bits will be set to a one. If the buffer fills, then a full
frame of data will be deleted and the SR5.0 and SR5.2 bits will be set to a one.
20.1.2 E1 Mode
If the elastic store is enabled, then either CAS or CRC-4 multiframe boundaries will be indicated via the
RMSYNC output. If the user selects to apply a 1.544MHz clock to the RSYSCLK pin, then every fourth
channel of the received E1 data will be deleted and a F-bit position (which will be forced to one) will be
inserted. Hence,
hannels 1, 5, 9, 13, 17, 21, 25, and 29 (time slots 0, 4, 8, 12, 16, 20, 24, and 28) will be
c
deleted from the received E1 data stream. Also, in 1.544MHz applications, the RCHBLK output will not
be active in channels 25 through 32 (or in other words, RCBR4 is not active). If the two-frame elastic
buffer either fills or empties, a controlled slip will occur. If the buffer empties, then a full frame of data
will be repeated at RSER and the SR5.0 and SR5.1 bits will be set to a one. If the buffer fills, then a full
frame of data will be deleted and the SR5.0 and SR5.2 bits will be set to a one.
119 of 269
Related parts for DS21458LDK
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
IC LIU QUAD T1/E1/J1 256-CSBGA
Manufacturer:
Maxim Integrated Products
Part Number:
Description:
Network Controller & Processor ICs Quad E1-T1-J1 Single -Chip Transceiver (S
Manufacturer:
Maxim Integrated Products
Part Number:
Description:
Network Controller & Processor ICs
Manufacturer:
Maxim Integrated
Datasheet:
Part Number:
Description:
power light source Luxeon Line
Manufacturer:
LUMILEDS [Lumileds Lighting Company]
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:
MAX7528KCWPMaxim Integrated Products [CMOS Dual 8-Bit Buffered Multiplying DACs]
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