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S3C2440X Datasheet(PDF) 54 Page - Samsung semiconductor |
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S3C2440X Datasheet(HTML) 54 Page - Samsung semiconductor |
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54 / 429 page  2003.09.25 Preliminary product information describes products that are in development, for which full characterization data and associated errata are not yet available Specifications and information herein are subject to change without notice. S3C2440X RISC MICROPROCESSOR MEMORY CONTROLLER DEC.13, 2002 5-13 BUS WIDTH & WAIT CONTROL REGISTER (BWSCON) Register Address R/W Description Reset Value BWSCON 0x48000000 R/W Bus width & wait status control register 0x000000 BWSCON Bit Description Initial state ST7 [31] Determine SRAM for using UB/LB for bank 7. 0 = Not using UB/LB (The pins are dedicated nWBE[3:0]) 1 = Using UB/LB (The pins are dedicated nBE[3:0]) 0 WS7 [30] Determine WAIT status for bank 7. 0 = WAIT disable 1 = WAIT enable 0 DW7 [29:28] Determine data bus width for bank 7. 00 = 8-bit 01 = 16-bit, 10 = 32-bit 11 = reserved 0 ST6 [27] Determine SRAM for using UB/LB for bank 6. 0 = Not using UB/LB (The pins are dedicated nWBE[3:0 ) 1 = Using UB/LB (The pins are dedicated nBE[3:0]) 0 WS6 [26] Determine WAIT status for bank 6. 0 = WAIT disable, 1 = WAIT enable 0 DW6 [25:24] Determine data bus width for bank 6. 00 = 8-bit 01 = 16-bit, 10 = 32-bit 11 = reserved 0 ST5 [23] Determine SRAM for using UB/LB for bank 5. 0 = Not using UB/LB (The pins are dedicated nWBE[3:0]) 1 = Using UB/LB (The pins are dedicated nBE[3:0]) 0 WS5 [22] Determine WAIT status for bank 5. 0 = WAIT disable, 1 = WAIT enable 0 DW5 [21:20] Determine data bus width for bank 5. 00 = 8-bit 01 = 16-bit, 10 = 32-bit 11 = reserved 0 ST4 [19] Determine SRAM for using UB/LB for bank 4. 0 = Not using UB/LB (The pins are dedicated nWBE[3:0]) 1 = Using UB/LB (The pins are dedicated nBE[3:0]) 0 WS4 [18] Determine WAIT status for bank 4. 0 = WAIT disable 1 = WAIT enable 0 DW4 [17:16] Determine data bus width for bank 4. 00 = 8-bit 01 = 16-bit, 10 = 32-bit 11 = reserved 0 ST3 [15] Determine SRAM for using UB/LB for bank 3. 0 = Not using UB/LB (The pins are dedicated nWBE[3:0]) 1 = Using UB/LB (The pins are dedicated nBE[3:0]) 0 WS3 [14] Determine WAIT status for bank 3. 0 = WAIT disable 1 = WAIT enable 0 DW3 [13:12] Determine data bus width for bank 3. 00 = 8-bit 01 = 16-bit, 10 = 32-bit 11 = reserved 0 ST2 [11] Determine SRAM for using UB/LB for bank 2. 0 = Not using UB/LB (The pins are dedicated nWBE[3:0]) 1 = Using UB/LB (The pins are dedicated nBE[3:0].) 0 |
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