参数资料
型号: IBM25PPC405GPR3BB400Z
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 400 MHz, RISC PROCESSOR, PBGA456
封装: 35 X 35 MM, ENHANCED, PLASTIC, BGA-456
文件页数: 40/58页
文件大小: 1264K
代理商: IBM25PPC405GPR3BB400Z
Preliminary
PowerPC 405GPr Embedded Processor Data Sheet
3/14/03
Page 45 of 58
Peripheral Interface Clock Timings
Parameter
Min
Max
Units
PCIClk input frequency (asynchronous mode)
Note 1
66.66
MHz
PCIClk period (asynchronous mode)
15
Note 1
ns
PCI Clock frequency (synchronous mode)
25
33.33
MHz
PCI Clock period (synchronous mode - Note 2)
30
40
ns
PCIClk input high time
40% of nominal period
60% of nominal period
ns
PCIClk input low time
40% of nominal period
60% of nominal period
ns
EMCMDClk output frequency
2.5
MHz
EMCMDClk period
400
ns
EMCMDClk output high time
160
ns
EMCMDClk output low time
160
ns
PHYTxClk input frequency
2.5
25
MHz
PHYTxClk period
40
400
ns
PHYTxClk input high time
35% of nominal period
ns
PHYTxClk input low time
35% of nominal period
ns
PHYRxClk input frequency
2.5
25
MHz
PHYRxClk period
40
400
ns
PHYRxClk input high time
35% of nominal period
ns
PHYRxClk input low time
35% of nominal period
ns
PerClk output frequency
66.66
MHz
PerClk period
15
ns
PerClk output high time
45% of nominal period
55% of nominal period
ns
PerClk output low time
45% of nominal period
55% of nominal period
ns
PerClk clock edge stability (phase jitter, cycle to cycle)
± 0.3
ns
UARTSerClk input frequency (Note 3)
1000/(2TOPB+2ns)
MHz
UARTSerClk period
2TOPB+2
–ns
UARTSerClk input high time
TOPB+1
–ns
UARTSerClk input low time
TOPB+1
–ns
TmrClk input frequency
66.66
MHz
TmrClk period
15
ns
TmrClk input high time
40% of nominal period
60% of nominal period
ns
TmrClk input low time
40% of nominal period
60% of nominal period
ns
Note:
1. In asynchronous PCI mode the minimum PCIClk frequency is 1/8 the PLB Clock. Refer to the
PowerPC 405GPr Embedded
Processor User’s Manual for more information.
2. In synchronous PCI mode the PCI clock is derived from SysClk and the PCIClk input pin is unused.
3. TOPB is the period in ns of the OPB clock. The maximum OPB clock frequency is 66.66MHz.
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