Atmel AT7910E Datasheet
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AT7910E SpW-10X SpaceWire Router DATASHEET Features SpaceWire Router Logical to Physical addressing translation Priority Management Header Deletion Capability Eight Bidirectional SpaceWire links Full duplex communication Data rate from 2 up to 200 Mbit/s in each direction Two External Interfaces Dedicated Input and Output FIFO
Atmel AT7910E, AT7910E [DATASHEET] 7796G AERO 02/13 2 Description The SpW-10X SpaceWire routing switch is capable of connecting many nodes, providing a means of routing packets between the nodes connected to it. It comprises eight SpaceWire link interfaces and a routing matrix. The routing matrix enables packets arriving at one link interface to be transferred to and sent out of another link interface on the routing switch. The AT7910E was designed by Austrian Aerospace (Austria) and the University of Dundee (Scotland). It is manufactured using the SEU hardened cell library from Atmel MH1RT CMOS 0.35µm radiation harden
Atmel AT7910E, AT7910E [DATASHEET] 7796G AERO 02/13 3 Table of Contents 1. Functional Description ........................................................................ 4 1.1 SpaceWire Ports ............................................................................................... 5 1.2 External Ports.................................................................................................... 5 1.3 Configuration Port ............................................................................................. 5 1.4 Routing table ..
Atmel AT7910E, AT7910E [DATASHEET] 7796G AERO 02/13 4 1. Functional Description The SpaceWire router comprises the following functional logic blocks: Eight SpaceWire bi-directional serial ports. Two external parallel input/output ports each comprising an input FIFO and an output FIFO. A non-blocking crossbar switch connecting any input port to any output port. An internal configuration port accessible via the crossbar switch from the external parallel input/output port or the SpaceWire input/output ports. A routing table accessible via the configuration port which holds the logical address to output port mapping. Control logic to control t
AT7910E [DATASHEET] 7796G AERO 02/13 5 The AT7910E provides a routing capability between eight SpaceWire links according to the SpaceWire Standard ECSS- E-50-12A. In addition for use as a node interface, the AT7910E integrates other interfaces such as: External ports Configuration port Time-code interface Control/Status interface 1.1 SpaceWir
Atmel AT7910E, AT7910E [DATASHEET] 7796G AERO 02/13 6 1.5 Routing control logic and crossbar The routing control logic is responsible for arbitration of output ports, group adaptive routing and the crossbar switching. Arbitration is performed when two or more source ports are requesting to use the same destination port. A priority based arbitration scheme with two priority levels, high and low, is used where high priority packets are routed before low priority packets. Fair arbitration is performed on packets which have the same priority levels to ensure each packet gets equal access to the output port. Group adaptive routing control selects one of a number of out
Atmel AT7910E, AT7910E [DATASHEET] 7796G AERO 02/13 7 2. Typical Applications The AT7910E SpaceWire router is perfectly suited for development of applications requiring a standalone router, a terminal node with SpaceWire interface or a mixed configuration of the two previous ones. 2.1 Stand-alone router The AT7910E SpaceWire Router may be used as a stand-alone router with up to eight SpaceWire links connected to it. Configuration of the routing tables etc. may be done by sending Spa
Atmel AT7910E, AT7910E [DATASHEET] 7796G AERO 02/13 8 Figure 2-2. AT7910E as SpaceWire node interface 2.3 Embedded router The SpaceWire Router device can also be used to provide a node with an embedded router. In this case the external ports are used to provide the local connections to the node and the SpaceWire ports are used to make connections to other ports in the network. Figure 2-3. AT7910E as Embedded Router
Atmel AT7910E, AT7910E [DATASHEET] 7796G AERO 02/13 9 3. PLL Filter The AT7910E uses an internal PLL to provide the base transmit clock signal for the SpaceWire interfaces. External components are required to implement the PLL loop filter and to provide a bias for the PLL VCO. Note that RVCO, C and C0 are all connected to a quiet common ground track. Dedicated decoupling capacitors are also required for the PLL power supply. Figure 3-1. PLL filter and decoupling capacitors Table 3-1. PLL filter recommended components Component Value R 10kW ± 5%, ¼W C 120pF, ± 5% C0 3.3pF, ± 5% RVCO 4.7kW for 100-150MHz o
Atmel AT7910E, AT7910E [DATASHEET] 7796G AERO 02/13 10 4. LVDS Interface The AT7910E provides 8 SpaceWire link based on LVDS IOs that should comply with the EIA-644 standard requirements. The basic LVDS interface consists in a single differential link interconnected between a transmiter and a receiver. Such a link requires a termination resistor on the receiver side to allow high frequency transfer usage. The nominal resistor value for the termination resistor 100 ohms. LVDS bidirectional communication principle Figure 4-1. LVDS int
Atmel AT7910E, AT7910E [DATASHEET] 7796G AERO 02/13 11 4.2 AT7910E Compatibility with LVDS receiver Standards The LVDS driver produces a differential voltage across a 100-Ω load in the range of 247mV to 550mV with a typical offset voltage of 1.2V relative to ground. The recommended voltage applied to the LVDS receiver is between ground and 2.4 V with a common mode range of 0.05V to 2.35V. The receiver has a sensitivity level of ±100 mV to correctly assume the intended binary state. The LVDS interconnecting media must be matched with the 100ohm termination resistor located at the inputs of the receiver.
Atmel AT7910E, AT7910E [DATASHEET] 7796G AERO 02/13 12 5. Package Information 5.1 Package Outline 5.1.1 MQFPF 196 Here is a presentation of the mechanical outline of the 196 pins Ceramic Quad Flat Pack (CQFP 196) package used for the AT7910E. Figure 5-1. MQFPF 196 package
Atmel AT7910E, AT7910E [DATASHEET] 7796G AERO 02/13 13 Table 5-1. Pin Assignment Pin Assignment Pin Number Name Pin Number Name Pin Number Name Pin Number Name Pin Number Name 1 VDDB 41 VSSB 81 SIN-7 121 EXTINDATA9_6 161 EXTTIMEIN2 2 CLK 42 VSSA 82 SOUT-7 122 EXTINDATA9_7 162 EXTTIMEIN3 3 RST 43 VDDA 83 SOUT+7 123 EXTINDATA9_8 163 EXTTIMEIN4 4 TESTIOE 44 VDDB 84 VSSB 124 EXTINFULL9 164 EXTTIMEIN5 5 TESTE 45 DOUT-3 85 VDDB 125 VSSB 165 EXTTIMEIN6 6 FEEDBDIV0 46 DOUT+3 86 DOUT-7 126 VDDB 166 EXTTIMEIN7 7 VSSA 47 DI
AT7910E [DATASHEET] 7796G AERO 02/13 14 5.2 Pin Description Table 5-2. Pin Description Signal Name(1)(3) Type(2) Function Buffer type VDDA VDDB VDDPLL 3.3V Power for the device POWER VSSA VSSB VSSPLL Ground for the device POWER LVDSRef LVDS Power reference for the device POWER VCOBias Bias for the PLL VCO (Rvco) Lo
Atmel AT7910E, AT7910E [DATASHEET] 7796G AERO 02/13 15 Signal Name(1)(3) Type(2) Function Buffer type EXTOUTREAD10* I Asserted Low to read from the external output port one FIFO. CMOS3V3 EXTINFULL10* O FIFO ready signal for external input port one. When high there is space in the FIFO so it can be written to. When low the FIFO is full. CMOS3V3 EXTINWRITE10* I Asserted Low to write to the external input port one FIFO. CMOS3V3 EXTTICKIN I The rising edge of the EXT_TICK_IN signal is used to indicate when a time- code is to be sent CMOS3V3 EXTTIMEIN[7:0] I EXT_TIME_IN(7:0) provides the value of the time-code to be dis
Atmel AT7910E, AT7910E [DATASHEET] 7796G AERO 02/13 16 5.3 Electrical Characteristics 5.4 Absolute Maximum Ratings Table: Absolute rating ltside Supply Voltage (VCC)…………….……......................................... -0.5V to +4V I/O Voltage…………………………………………………..….-0.5V to VCC+0.5V Storage Temperature (Tstg).....................................................-65 C to +150 C Junction Temperature (Tj)………………………………………….………...175 C Junction to Case Thermal resistance (RThjc) .....
Atmel AT7910E, AT7910E [DATASHEET] 7796G AERO 02/13 17 5.7 AC Electrical Characteristics The following table gives the worst case timings measured by Atmel on the 3.0V to 3.6V operating range Table 5-5. 3.3V operating range timings (1) Parameter Symbol Min. Max. Unit Propagation delay CLK Low to DOUT0 High Tp0 16 ns Propagation delay CLK Low to DOUT1 High Tp1 16 ns Propagation delay CLK Low to DOUT2 High Tp2 16 ns Propagation delay CLK Low to DOUT3 High Tp3 16 ns Propagation delay CLK Low to DOUT4 High Tp4 16 ns Propagation delay CLK Low to DOUT5 High Tp5 16 ns Propagation delay CLK
AT7910E [DATASHEET] 7796G AERO 02/13 18 Note: 1. The timing parameters presented in the above table are measured under production configuration (PLL bypassed and test mode enabled). During normal operation (PLL active and test mode disabled) the propagation delay is directly linked to the PLL . Then, the timing figures are not applicable u
Atmel AT7910E, AT7910E [DATASHEET] 7796G AERO 02/13 19 6. Ordering Information 6.1 AT7910E Ordering Codes Atmel Ordering Code Package Type Temperature Range Quality Level AT7910EKB-E MQFPF196 25°C Engineering sample 5962-09A0301QXC MQFPF196 -55°C to +125°C QML_Q 5962-09A0301VXC MQFPF196 -55°C to +125°C QML_V 5962R09A0301VXC MQFPF196 -55°C to +125°C QMLV-RHA (*) according to Atmel Quality flow document 4288, see Atmel web site
Atmel AT7910E, AT7910E [DATASHEET] 7796G AERO 02/13 20 7. Revision History Doc. Rev. Date Comments B 02-2009 Corrected pinout error: pin 190 is VDDA and not VSSB. See Table 1 on page 6. C 06-2009 Corrected ICCop Value.See Table 7-3 on page 14 D 07-2009 Removing untested ICCop Value.See Table 7-3 on page 14 E 07-2009 SMD Part numbers added. F 08-2009 Remove Atmel Part numbers. G 02-2013 Template update Addition of VOS min/max Addition of VOD min/max
Atmel AT7910E, Atmel Corporation 2325 Orchard Parkway San Jose, CA 95131 USA Tel: (+1)(408) 441-0311 Fax: (+1)(408) 487-2600 www.atmel.com Atmel Asia Limited Unit 01-5 & 16, 19F BEA Tower, Millennium City 5 418 Kwun Tong Road Kwun Tong, Kowloon HONG KONG Tel: (+852) 2245-6100 Fax: (+852) 2722-1369 Atmel Munich GmbH Business Campus Parkring 4 D-85748 Garching b. Munich GERMANY Tel: (+49) 89-31970-0
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