Laptop User Manual

S3C2440A 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] Determines 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] Determines WAIT status for bank 7.
0 = WAIT disable 1 = WAIT enable
0
DW7 [29:28] Determines data bus width for bank 7.
00 = 8-bit 01 = 16-bit, 10 = 32-bit 11 = reserved
0
ST6 [27] Determines 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] Determines WAIT status for bank 6.
0 = WAIT disable, 1 = WAIT enable
0
DW6 [25:24] Determines data bus width for bank 6.
00 = 8-bit 01 = 16-bit, 10 = 32-bit 11 = reserved
0
ST5 [23] Determines 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] Determines WAIT status for bank 5.
0 = WAIT disable, 1 = WAIT enable
0
DW5 [21:20] Determines data bus width for bank 5.
00 = 8-bit 01 = 16-bit, 10 = 32-bit 11 = reserved
0
ST4 [19] Determines 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] Determines 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] Determines 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] Determines WAIT status for bank 3.
0 = WAIT disable 1 = WAIT enable
0
DW3 [13:12] Determines data bus width for bank 3.
00 = 8-bit 01 = 16-bit, 10 = 32-bit 11 = reserved
0
ST2 [11] Determines 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