參數(shù)資料
型號: HMS30C7202
廠商: HYNIX SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 32-bit ARM7TDMI RISC static CMOS CPU core
中文描述: 32-BIT, 82.944 MHz, RISC PROCESSOR, PBGA256
封裝: 17 X 17 MM, 1.40 MM HEIGHT, 1 MM PITCH, FBGA-256
文件頁數(shù): 61/161頁
文件大?。?/td> 973K
代理商: HMS30C7202
HMS30C7110
2003 MagnaChip Semiconductor Ltd. All Rights Reserved
Version 1.5
61
15:12 RW
0xf
RAS (Row Active Time)
This 4-bit field specifies the number of cycles guaranteed between an
activate command and a pre-charge command.
11: 8
RW
0xf
RC (Row Cycle Time)
This 4-bit field specifies the number of cycles for a refresh command. It
also specifies the number of cycles between bank activation commands
to the same bank.
7: 6
0x0
Reserved
5: 4
RW
0x7
CL (CAS Latency)
This value is used to program the SDRAM devices during the
Initialization sequence, and internally by the SDRAM controller.
0 = 1 clock
1 = 2 clocks
2 = 3 clocks
3 = Reserved
3: 2
0x0
Reserved
0
RW
0x1
Row Hit Enable
This value is used to enable the checking of the row address from
internal logic matched with row address of destination SDRAM. It may
cause one or two clock delay in accessing SDRAM but will make sure
that correct operation will be happening.
0 : Do not check whether row address is HIT or not.
1 : Check whether row address is HIT or not.
2.5.2.3.
Refresh Interval
This register includes refresh interval value and MCLK tuning control reginter.
Table 2.18 Refresh Interval
Address :
1908_0014
Bits
Access Default Description
31:29
0x0
Reserved.
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