参数资料
型号: 440SP
厂商: Applied Micro Circuits Corp.
英文描述: PowerPC 440SP Embedded Processor
中文描述: 嵌入式处理器的PowerPC 440SP
文件页数: 68/85页
文件大小: 615K
代理商: 440SP
PowerPC 440SP Embedded Processor
70
AMCC Proprietary
Revision 1.23 - Sept 26, 2006
Data Sheet
I/O Specifications
Table 13. Peripheral Interface Clock Timings
Parameter
Min
Max
Units
Notes
PCIXxClk input frequency (asynchronous mode)
133.33
MHz
2
PCIXxClk period (asynchronous mode)
7.5
ns
PCIXxClk input high time
40% of nominal period
60% of nominal period
ns
PCIXxClk 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
EMCTxClk input frequency
2.5
25
MHz
EMCTxClk period
40
400
ns
EMCTxClk input high time
35% of nominal period
ns
EMCTxClk input low time
35% of nominal period
ns
EMCRxClk input frequency
2.5
25
MHz
EMCRxClk period
40
400
ns
EMCRxClk input high time
35% of nominal period
ns
EMCRxClk input low time
35% of nominal period
ns
PerClk output frequency (for sync. slaves)
83.33
MHz
PerClk period
12
ns
PerClk output high time
50% of nominal period
66% of nominal period
ns
PerClk output low time
33% of nominal period
50% of nominal period
ns
UARTSerClk input frequency
1000/(2TOPB+2ns)
MHz
1
UARTSerClk period
2TOPB+2
–ns
1
UARTSerClk input high time
TOPB+1
–ns
1
UARTSerClk input low time
TOPB+1
–ns
1
TmrClk input frequency
100
MHz
TmrClk period
10
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
Notes:
1. TOPB is the period in ns of the OPB clock. The internal OPB clock runs at an integral divisor ratio of the frequency of
the PLB clock. The maximum OPB clock frequency is 83.33 MHz. Refer to the Clocking chapter of the PPC440SP
Embedded Processor User’s Manual for details.
2. When the PCI-X interface is used to support a legacy PCI interface, the maximum PCIXClk frequency is 66.66MHz.
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