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MPC8540 Datasheet(PDF) 600 Page - Freescale Semiconductor, Inc |
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MPC8540 Datasheet(HTML) 600 Page - Freescale Semiconductor, Inc |
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600 / 1302 page ![]() MPC8540 PowerQUICC III Integrated Host Processor Reference Manual, Rev. 1 13-96 Freescale Semiconductor Local Bus Controller The logical address is partitioned as shown in Table 13-40. The following parameters can be extracted: • COLS = 100, 11 column lines • ROWS = 100, 13 row lines During the address phase, the SDRAM address port is set as in Table 13-41. Because the internal bank selects are multiplexed over LA[15:16], LSDMR[BSMA] must be set to 011. Table 13-42 shows the address port settings during a READ/WRITE command. Table 13-43 shows the register configuration. PSRT and MPTPR are not shown, but they should be programmed according to the specific device’s refresh requirements. Table 13-40. Logical Address Partitioning A[0:3] A[4:16] A[17:18] A[19:29] A[30:31] msb of start address Row Bank select Column lsb Table 13-41. SDRAM Device Address Port During Address Phase LA[0:13] LA[15:16] LA[17:29] LA[30:31] — Internal bank select (A[17:18]) Row (A[4:16]) No-connect Table 13-42. SDRAM Device Address Port During READ/WRITE Command LA[0:14] LA[15:16] LA[17] LA[18] LA[19:29] LA[30:31] msb of start address Internal bank select Don’t care AP Column No-connect Table 13-43. Register Settings for 512-Mbyte SDRAMs Register Field Value BRn BA Base address XBA ext. Base address PS 11 = 32-bit port size MS 011 = SDRAM-local bus V1 ORn AM 11_1110_0000_0000_0000_0 XAM 11 BPD 01 COLS 100 ROWS 100 |
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