N.A.T. NAT-MCH, Техническое справочное руководство

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NAT-MCH BASE-Module– Technical Reference Manual
Version 2.10 © N.A.T. GmbH 15
The signal mapping for the Coax-IO module can be found below:
Table 2: NAT-MCH BASE-Module – Coax-IO signal mapping
Schematic Name Script Name Function Coax-IO
Extref1_p EXT single ended 1 SMA_1 Rx
Extref1_n EXT single ended 2 SMA_1 Tx
Extref2_p EXT single ended 3 SMA_2 Rx
Extref2_n EXT single ended 4 SMA_2 Tx
Table 3: NAT-MCH BASE-Module – Coax-IO Electrical characteristics
Parameter Min. Typ. Max. Unit
Input Voltage peak to peak 0.3 5 V
Output Voltage peak to peak
(with 50 Ohm sink termination)
1 V
Input Frequency 1 50M Hz
Output Frequency 250 125M Hz
Termination Resistance 50 Ω
3.4.3.2 RJ45-Clock-Interface
Instead of the second GbE-Port the NAT-MCH BASE-Module can be assembled
with a second RJ45 connector usable as RJ45-Clock-Interface.
CAUTION:
The second GbE-Interface is not available with this assembly option! The pin
assignment of the RJ45-Clock-Interface differs from the GbE-Interface! For
detailed information please refer to chapter 4.2.11.
The signals are directly connected to LVDS compliant I/Os of the clock module
FPGA. To prevent the unit from damage, only signals complying with the LVDS
signal standard may be applied to this interface!
Other External Reference Clock Transceiver Modules
Please contact N.A.T. GmbH if the available Clock transceiver modules or any
parameter does not satisfy the needs for your application.
3.5 Interface to Extension Modules
3.5.1 NAT-MCH CKL-Module / NAT-MCH CLK-PHYS-Module
The NAT-MCH CLK-Module / NAT-MCH CLK-PHYS-Module can be accessed by
the ColdFire MCF54452 via I²C bus.
To interface the
NAT-MCH HUB-Module , a SPI interface is also available. The
SPI interface of the ColdFire is used for this purpose.
3.5.2 NAT-MCH HUB-Module
The NAT-MCH HUB-Module is connected to the NAT-MCH BASE-Module over
the same connector that connects the NAT-MCH CLK-Module / NAT-MCH CLK-