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PDP83TG720SWCSTQ1 bảng dữ liệu(PDF) 30 Page - Texas Instruments |
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PDP83TG720SWCSTQ1 bảng dữ liệu(HTML) 30 Page - Texas Instruments |
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30 / 199 page ![]() Table 7-2. Datapath BIST Programming (continued) Loopback Mode To enable loopback mode To enable data generator and checker : MAC packets To check in- coming MAC packets status To enable data generator and checker : PRBS stream To check in- coming PRBS status : PRBS stream Other care- abouts 5 SGMII loopback • write : reg[0x0000] = 0x4140 • Data is generated externally at Sgmii TX pins • Write : reg[0x0619] = 0x1114 • Data can be verified at Sgmii RX pins. • Packet errors can additionaly be checked internally by : – read : reg[0x0 63C]= [15:0] of total receive d packets count. – read : reg[0x0 63D] = [31:16] of total receive d packets count. – read : reg[0x0 63E] = Packets receive d with CRC errors • Data is generated externally at Sgmii Tx pins. • Not applicable as data is external. • PRBS stream checker works only with internal data generator. • Generated data will be going to Cu cable side, to disable this transmissio n : write reg[0x041F] = 0x1000 6 RGMII Reverse loopback • write : reg[0x0016] = 0x0010 • write : reg[0x0619 ]=0x1005 • write : reg[0x0624 ]=0x55BF • read : reg[0x063C] = [15:0] of total received packets count. • read : reg[0x063D] = [31:16] of total received packets count. • read : reg[0x063E] = Packets received with CRC errors • write : reg[0x0619 ]=0x0557 • write : reg[0x0624 ]=0x55BF Step 1 : write : reg[0x0620][1] = 1'b1 Step 2 : • read : reg[0x0620] [7:0] = Number of error bytes received. • read : reg[0x0620] [8] (1 indicates PRBS data is coming in and checker is locked) • Generated data will be going to Cu cable side, to disable this transmissio n : write reg[0x041F] = 0x1000 DP83TG720S-Q1 SNLS604 – SEPTEMBER 2020 www.ti.com 30 Submit Document Feedback Copyright © 2020 Texas Instruments Incorporated |
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