Ext. I/O Bank Controller Special Register - Samsung S3C2500B User Manual

S3C2500B

5.6.3 EXT. I/O BANK CONTROLLER SPECIAL REGISTER

To control the external memory operations, the memory controller uses a dedicated set of special registers
(see Table 5-15). By programming the values in the memory controller special registers, you can specify
such things as
• •
Memory type
•
External bus width selection
• •
Control signal timing
• •
Ext I/O access cycles control
• •
The sizes of memory banks to be used for arbitrary address spacing
The memory controller uses some special registers to control the generation and processing of the control
signals, addresses, and data that are required by the external devices in a standard system configuration.
The special registers are also used to control access to all banks.
Name Address
B0CON 0xF0010000
B1CON 0xF0010004
B2CON 0xF0010008
B3CON 0xF001000C
B4CON 0xF0010010
B5CON 0xF0010014
B6CON 0xF0010018
B7CON 0xF001001C
MUXBCON 0xF0010020
WAITCON 0xF0010024
NOTE: B0SIZE means the size of physical data bus width in Bank 0. Refer to the next page.
Table 5-15. Ext. I/O Bank Controller Special Registers
Description
Bank 0 control register
Bank 1 control register
Bank 2 control register
Bank 3 control register
Bank 4 control register
Bank 5 control register
Bank 6 control register
Bank 7 control register
Muxed bus control register
Wait control register
MEMORY CONTROLLER
Reset Value
0xC514E488 (B0SIZE=3)
0x8514E488 (B0SIZE=2)
0x4514E488 (B0SIZE=1)
0xC514E488
0xC514E488
0xC514E488
0xC514E488
0xC514E488
0xC514E488
0xC514E488
0x006DB6DB
0x00000000
5-21