DS3184DK Maxim Integrated Products, DS3184DK Datasheet - Page 109
DS3184DK
Manufacturer Part Number
DS3184DK
Description
KIT DEMO FOR DS3184
Manufacturer
Maxim Integrated Products
Datasheet
1.DS3184DK.pdf
(400 pages)
Specifications of DS3184DK
Main Purpose
Telecom, ATM / Packet PHYs
Utilized Ic / Part
DS3184
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Secondary Attributes
-
Embedded
-
Primary Attributes
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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DS3181/DS3182/DS3183/DS3184
After reset, the device will be in the default configuration:: The latched status bits are enabled to be cleared on
write. The CLAD is disabled. The global 8KREF and one-second timers are disabled. The line interface is in B3ZS
mode and the LIU is disabled and the transmit line pins are also disabled. The frame mode is DS3 C-bit with
automatic downstream AIS on LOS or OOF is enabled and automatic RDI on LOF, LOS, SEF or AIS is enabled
and automatic FEBE is enabled. Transmit clock comes from the CLAD CLKA pin. Cell processing is enabled with
payload scrambling and HEC recalculation and Coset addition enabled. The transmit and receive FIFOs are held in
reset so no cell traffic will occur until the FIFOs are configured. The system interface is in 8-bit UTOPIA L2 with odd
parity enabled and HEC transfer disabled. The pin inversion on all pins is disabled.
Individual blocks are reset and powered down when not used determined by the settings in the line mode bits
PORT.CR2.LM[2:0] and framer mode bits PORT.CR2.FM[5:0].
10.4 Global Resources
10.4.1 Clock Rate Adapter (CLAD)
The clock rate adapter is used to create multiple clocks for LIU reference clocks or transmit clocks from a single
clock reference input on the CLKA pin. The clock frequency applied to this pin must be at the DS3 (44.736 MHz),
E3 (34.368 MHz) and STS-1 (51.84 MHz) clock rates. Given one of these clocks the other two clocks will be
generated. The internally generated signals can be driven on output pins (CLKB and CLKC) for external use.
The receive LIU is supplied a reference clock from the CLAD. The receive LIU selects the clock frequency based
upon the mode the user selects via the FM bits. The CLAD output is also available as a transmit clock source if
selected via the PORT.CR2.CLADC register bit.
The user must supply at least one of the three rates (DS3, E3, STS-1) to the CLKA pin. The CLAD[3:0] bits informs
the PLL of the frequency applied to the pins. Selection of the output clock of the CLAD applied to the LIU and
optionally the transmitter is controlled by the FM bits (located in PORT.CR2). The CLAD allows maximum flexibility
to the user. The user may supply any of the three clock rates and use the CLAD to convert the rate to the particular
clock rate needed for his application.
109
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