参数资料
型号: IBM25403GCX-3JC76C2
元件分类: 微控制器/微处理器
英文描述: RISC PROCESSOR, PQFP16
封装: PLASTIC, QFP-160
文件页数: 36/54页
文件大小: 541K
代理商: IBM25403GCX-3JC76C2
IBM PowerPC 403GCX
41
DRAM 2-1-1-1 Page Mode Read
Bank Register Bit Settings
Notes:
1. For burst access, the addresses represented by Columns 1 to 4 does not necessarily indicate that they are in
incremental address order. Typically, burst access is target word rst.
2. If internal mux mode is used, address bits A11:29 represent address bits described in Table 21 on page 34.
3. During internal mux mode access, A6:10 retain their unmultiplexed values.
4. If external mux mode is used, A11:29 are unaffected and do not change between CAS and RAS cycles.
5. If bus width is programmed as byte or half-word, WBE2:3 represent address bits A30:31 regardless of mux mode.
6. WBE0:1 are always ones during DRAM transfers.
7. Data is latched on the rising edge of SysClk when IOCR[DRC] = 0 (default setting).
8. Data is latched later (on the rising edge of CAS) if IOCR[DRC] = 1.
SLF
ERM
Bus
Width
Ext
Mux
RAS-to-
CAS
Refresh
Mode
Page
Mode
First
Access
Burst
Access
Prechg
Cycles
Refresh
RAS
Refresh
Rate
Bit 13 Bit 14 Bits 15:16 Bit 17
Bit 18
Bit 19
Bit 20 Bits 21:22 Bits 23:24
Bit 25
Bit 26
Bits 27:30
0 or 1
0
xx
x
0
1
00
0
x
xxxx
1
2
3
4
5
6
7
8
SysClk
A11:29,
R/W
RAS
CAS0:3
DRAMOE
DRAMWE
D0:31
AMuxCAS
RAS
CAS
Pre-Charge
Row
Column2 Column3
Column4
Column1
Data1
Data2
Data3
Data4
WBE2[A30],
WBE3[A31]
BusError
Error
?
??
Note 8
Note 7
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