參數(shù)資料
型號: IBM25PPC405GP-3DD200C
元件分類: 微控制器/微處理器
英文描述: RISC PROCESSOR, PBGA456
封裝: 27 MM, PLASTIC, BGA-456
文件頁數(shù): 51/58頁
文件大?。?/td> 878K
代理商: IBM25PPC405GP-3DD200C
PowerPC 405GP Embedded Processor Data Sheet
55
I/O Specications—266MHz (Preliminary)
Notes:
1. The two-cycle SDRAM command interface is driven in cycle 1 and used in cycle 2. Output times in table are in cycle 1.
2. SDRAM output timing is relative to the rising edge of the internal PLB clock, which is an integral multiple of and rising-
edge aligned with SysClk. Therefore, SDRAM output timings in the table are shown relative to SysClk. Timings shown
are for a lumped 50pF load, however the interface has been verified for PC100-compliant operation using transmission
line circuit analysis.
3. SDRAM CLK0:1 rising edge at package pin precedes the internal PLB clock by approximately 0.5ns for a typical clock
network or a lumped 10pF load.
4. PerClk rising edge at package pin with a 10pF load trails the internal PLB clock by approximately 0.8ns.
Signal
Input (ns)
Output (ns)
Output Current (mA)
Clock
Notes
Setup Time
(minimum)
Hold Time
(minimum)
Valid Delay
(maximum)
50pF load
Hold Time
(minimum)
50pF load
I/O H
(maximum)
I/O L
(minimum)
SDRAM Interface
BA1:0
n/a
5.7
1
19
12
SysClk
1, 2
BankSe3:0
n/a
4.8
1
19
12
SysClk
2
CAS
n/a
5.7
1
19
12
SysClk
1, 2
ClkEn0:1
n/a
4.2
1
40
25
SysClk
2
DQM3:0
n/a
4.8
1
19
12
SysClk
2
DQMCB
n/a
4.8
1
19
12
SysClk
2
ECC7:0
1.5
1
4.8
1
19
12
SysClk
2
MemAddr12:0
n/a
5.7
1
19
12
SysClk
1, 2
MemClkOut0:1
n/a
0
-1
19
12
SysClk
2, 3
MemData31:0
1.5
1
4.9
1
19
12
SysClk
2
RAS
n/a
5.7
1
19
12
SysClk
1, 2
WE
n/a
5.7
1
19
12
SysClk
1, 2
External SLAVE Peripheral Interface
DMAAck0:3
n/a
6
0
12
8
PerClk
DMAReq0:3
dc
n/a
PerClk
EOT0:3[TC0:3]
dc
6
0
12
8
PerClk
PerAddr0:31
3
1
7.2
0
19
12
PerClk
PerBLast
3
1
6
0
12
8
PerClk
PerCS0
PerCS1:7[GPIO10:16]
n/a
6
0
12
8
PerClk
PerData0:31
5
1
7.2
0
19
12
PerClk
PerOE
n/a
6
0
12
8
PerClk
PerPar0:3
3
1
7.2
0
19
12
PerClk
PerR/W
4
1
6
0
12
8
PerClk
PerReady
6.5
1
n/a
PerClk
PerWBE0:3
3
1
6
0
12
8
PerClk
External MASTER Peripheral Interface
BusReq
n/a
6
0
12
8
PerClk
ExtAck
n/a
6
0
12
8
PerClk
ExtReq
4
1
n/a
PerClk
ExtReset
n/a
6
0
19
12
PerClk
HoldAck
n/a
6
0
12
8
PerClk
HoldPri
3
1
n/a
PerClk
HoldReq
4
1
n/a
PerClk
n/a
0.9
0.7
19
12
PLB Clk
4
PerErr
3
1
n/a
PerClk
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