Intel PXA26X Uživatelský manuál Strana 215

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Intel® PXA26x Processor Family Developer’s Manual 6-25
Memory Controller
6.6.5 SDRAM Command Overview
The processor accesses SDRAM with the following subset of standard interface commands:
Mode Register Set (MRS)
Bank Activate (ACT)
Read (READ)
Write (WRITE)
Precharge All Banks (PALL)
Precharge One Bank (PRE)
Auto-Refresh (CBR)
2x11x8x16 NOT VALID (illegal addressing combination)
2x11x9x32 BA1BA0A10A9A8A7A6A5A4A3A2A1A0
2x11x9x16 BA1BA0A10A9A8A7A6A5A4A3A2A1A0
2x11x10x32 BA1BA0A10A9A8A7A6A5A4A3A2A1A0
2x11x10x16 BA1BA0A10A9A8A7A6A5A4A3A2A1A0
2x11x11x32 NOT VALID (illegal addressing combination)
2x11x11x16 NOT VALID (illegal addressing combination)
2x12x8x32 BA1BA0A11A10A9A8A7A6A5A4A3A2A1A0
2x12x8x16 NOT VALID (illegal addressing combination)
2x12x9x32 BA1BA0A11A10A9A8A7A6A5A4A3A2A1A0
2x12x9x16 BA1BA0A11A10A9A8A7A6A5A4A3A2A1A0
2x12x10x32 BA1BA0A11A10A9A8A7A6A5A4A3A2A1A0
2x12x10x16 BA1BA0A11A10A9A8A7A6A5A4A3A2A1A0
2x12x11x32 NOT VALID (illegal addressing combination)
2x12x11x16 NOT VALID (illegal addressing combination)
2x13x8x32A12BA1BA0A11A10A9A8A7A6A5A4A3A2A1A0
2x13x8x16 NOT VALID (illegal addressing combination)
2x13x9x32A12BA1BA0A11A10A9A8A7A6A5A4A3A2A1A0
2x13x9x16A12BA1BA0A11A10A9A8A7A6A5A4A3A2A1A0
2x13x10x32 NOT VALID (too big)
2x13x10x16A12BA1BA0A11A10A9A8A7A6A5A4A3A2A1A0
2x13x11x32 NOT VALID (too big)
2x13x11x16 NOT VALID (too big)
Table 6-11. Pin Mapping to SDRAM Devices with SA-1111 Addressing (Sheet 2 of 2)
# Bits
Bank x
Row x
Col x
Data
Pin mapping to SDRAM devices for SA1111 Addressing Options.
MA[24:10] represent the address signals driven from the PXA26x processor family.
MA24 MA23 MA22 MA21 MA20 MA19 MA18 MA17 MA16 MA15 MA14 MA13 MA12 MA11 MA10
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