參數(shù)資料
型號: HMS30C2000
英文描述: [Application Specific Solution Product]
中文描述: [專用解決方案產(chǎn)品]
文件頁數(shù): 58/161頁
文件大?。?/td> 973K
代理商: HMS30C2000
HMS30C7110
2003 MagnaChip Semiconductor Ltd. All Rights Reserved
Version 1.5
58
path) using state information of main state machine.
The refresh block makes bus request signal to system bus arbiter to start refresh operation and when
the system bus arbiter gives bus grant signal to SDRAM controller, the main control logic detects
this signal and makes refresh command to signal generator.
The data-path block makes DATAOUT signal using system write data bus and makes system read
data bus using DATAIN signal according to state signal. In write operation, the data-path block
asserts the direction signal to enable output path of data pads.
CONFIGRUATION
REGISTERS
SIGNALS
GENERATOR
ADDRESS CONTROL
DATA PATH
MAIN CONTROL
LOGIC
nRAS
nCAS
DATA
ADDR
SYSTEM BUS
REFRESH
CONTROLLER
DQM
nSWE
nSCS
Figure 2.5 Block Diagram of SDRAM controller
2.5.2.
User Accessible Registers (Base = 0x1908_0000)
This section describes all base, control and status register inside the SDRAM controller. The
address field indicates a relative address in hexadecimal. Width specifies the number of bits in the
register and access specifies the valid access types that register. Where ‘RW’ stands for read and
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