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IXP2400 Datasheet(PDF) 14 Page - Intel Corporation |
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IXP2400 Datasheet(HTML) 14 Page - Intel Corporation |
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14 / 126 page  Intel® IXP2400 Network Processor 14 Datasheet 2.3.1 Control Store The Control Store is a RAM, which holds the program that the ME executes. It holds 4096 instructions, each of which is 40 bits wide. It is initialized by an external device (for example, the internal Intel XScale core.) The Control Store can optionally be protected by parity against soft errors. Figure 6. Microengine Block Diagram A9813-01 128 GPRs (A Bank) d e c o d e 128 GPRs (B Bank) 128 Next Neighbor 128 D XFER Out 128 D XFER In NN_Data_In D_Push S_Push 128 S XFER In 640 Local Mem A_Src B_Src Immed NN_Data_Out Dest Control Store Lm_addr_1 Lm_addr_0 CRC_Remainder A_Operand B_Operand ALU_Out S_Push S_Pull D_Pull CRC Unit Local CSRs T_Index NN_Get Execution Datapath (Shift, Add, Subtract, Multiply Logicals, Find First Bit, CAM) 128 S XFER Out Control Data |
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