參數(shù)資料
型號(hào): IBM25403GCX-3JC76C2
元件分類: 微控制器/微處理器
英文描述: RISC PROCESSOR, PQFP16
封裝: PLASTIC, QFP-160
文件頁數(shù): 47/54頁
文件大小: 541K
代理商: IBM25403GCX-3JC76C2
IBM PowerPC 403GCX
51
External Master DRAM Burst Write, 3-2-2-2 Page Mode
Bank Register Bit Settings
Notes:
1. XReq, XSize0, XSize1, and XAck are multiplexed with DMAR3, EOT3/TC3, OE, and DMAA3, respectively.
2. XSize0:1 = 11 indicates a burst transfer at the width of the DRAM device.
3. The burst is terminated in cycle 12 by deasserting the XReq input signal. A burst may also be terminated by deas-
serting either XSize0 or XSize1.
4. A4, A5, A30, and A31 are multiplexed with WBE0, WBE1, WBE2, and WBE3, respectively.
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
10
1
0
1
01
0
x
xxxx
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1
SysClk
R/W
RASx
CAS0:3
DRAMOE
DRAMWE
D0:31
AMuxCAS
HoldReq
HoldAck
XSize0:11,2,3
Ext Bus Master
DRAM Control
RAS CAS
Pre-
Chg
CAS
XReq BSel
CAS
CAS CAS
CAS
11
Valid Address1 - Ext Master
Valid Data1 - Ext Master
Address2
Address3
Address4
Data2
Data3
Data4
A4:314
XReq3
XAck
17
18
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