W90221X Winbond Electronics Corp America, W90221X Datasheet - Page 52

• Manufacturer Part Number: W90221X
• Description: Pa-risc Embedded Controller
• Manufacturer: Winbond Electronics Corp America

6.1
There are five 16-bit registers and one 22-bit I/O base register included in the memory
(DRAM) controller. Accessing to these registers is through an "I/O base address + offset"
scheme. Accessing to the I/O base register (IOBASE) is through the 0xf0000000 port. The
memory controller supports PC100-compliant synchronous DRAM.
W90221X version 0.6
Port Address
0xf0000000
BA + 0x30
BA + 0x32
BA + 0x34
BA + 0x36
BA + 0x38
BA + 0x3a
BA + 0x3e
BA + 0x3c
Memory controller Registers
DRAMTCTL0
DRAMTCTL1
DRAMTCTL2
DRAMCFG0
DRAMCTRL
DRAMCFG1
DRAMBA0
DRAMBA1
IOBASE
Symbol
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
DRAM Bank 0 Configuration Register
DRAM Bank 0 Base Register
DRAM Bank 1 Configuration Register
DRAM Bank 1 Base Register
DRAM Control Register
DRAM Timing Control Register 0
DRAM Timing Control Register 1
DRAM Timing Control Register 2
I/O Base Address
Description
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