主题中讨论的其他器件:ADC12DJ5200RF、 TI-JESD204-IP
您好!
现在、数据表和参考设计之间的差距让我感到困惑。
如何在传输层中处理 JMODE1数据格式?
以下是来自参考设计(SLWC120)中包含的传输层源代码的注释摘录。
源文件:transport_ADC12DJxx00.v
// Bit pattern for JMODE1. Please refer ADC12DJxx00 datasheet for more details // Bit packing format is same for both JMODE1 and JMODE3. Please view this verilog file in notepad++ to have proper alignment of the table shown below // On 3rd link clock, 40 samples from first half of first frame is sent out- [S0, S1,.., S39] with S0 as MSB in rx_dataout signal // On the 4th link clock, 40 samples from second half of first frame is sent out- [S40, S41,.., S79] with S40 as MSB in rx_dataout signal // On the 5th link clock, 40 samples from the first half of second frame is sent out- [S0, S1, S2, …, S39] with S0 as MSB in rx_dataout signal and the sequence repeats // Out samples are delayed by 3 link clocks, due to internal registering /* s0 31:20 s16 19:8 s32 7:0 31:28 s48 27:16 s64 15:4 3:0 s2 63:52 s18 51:40 s34 39:32 63:60 s50 59:48 s66 47:36 35:32 s4 95:84 s20 83:72 s36 71:64 95:92 s52 91:80 s68 79:68 67:64 s6 127:116 s22 115:104 s38 103:96 127:124 s54 123:112 s70 111:100 99:96 s8 159:148 s24 147:136 s40 135:128 159:156 s56 155:144 s72 143:132 131:128 s10 191:180 s26 179:168 s42 167:160 191:188 s58 187:176 s74 175:164 163:160 s12 223:212 s28 211:200 s44 199:192 223:220 s60 219:208 s76 207:196 195:192 s14 255:244 s30 243:232 s46 231:224 255:252 s62 251:240 s78 239:228 227:224 s1 287:276 s17 275:264 s33 263:256 287:284 s49 283:272 s65 271:260 259:256 s3 319:308 s19 307:296 s35 295:288 319:316 s51 315:304 s67 303:290 291:288 s5 351:340 s21 339:328 s37 327:320 351:348 s53 347:336 s69 335:324 323:320 s7 383:372 s23 371:360 s39 359:352 383:380 s55 379:368 s71 367:356 355:352 s9 415:404 s25 403:392 s41 391:384 415:412 s57 411:400 s73 399:388 387:384 s11 447:436 s27 435:424 s43 423:416 447:444 s59 443:432 s75 431:420 419:416 s13 479:468 s29 467:456 s45 455:448 479:476 s61 475:464 s77 463:452 451:448 s15 511:500 s31 499:488 s47 487:480 511:508 s63 507:496 s79 495:482 483:480 */
根据注释,LSB=>S32、MSB=>S15
但是、ADC12DJ5200RF 数据表指出、数据首先发送 MSB。
所以我认为 MSB 和 LSB 将如下所示。
LSB=>S0、MSB=>S47
例如、我认为短传输层的测试模式将如下图所示。
应该怎么做?
我很抱歉我没有说明清楚。
此致、
竹尾市