IBM25PPC440GP IBM Microelectronics, IBM25PPC440GP Datasheet - Page 55

• Manufacturer Part Number: IBM25PPC440GP
• Description: PowerPC 440GP Embedded Processor
• Manufacturer: IBM Microelectronics

PowerPC 440GP Embedded Processor Data Sheet
5/13/04
Peripheral Interface Clock Timings
PCIXClk input frequency (asynchronous mode)
PCIXClk period (asynchronous mode)
PCIXClk input high time
PCIXClk input low time
EMCMDClk output frequency
EMCMDClk period
EMCMDClk output high time
EMCMDClk output low time
EMCTxClk input frequency MII(RMII)
EMCTxClk period MII(RMII)
EMCTxClk input high time
EMCTxClk input low time
EMCRxClk input frequency MII(RMII)
EMCRxClk period MII(RMII)
EMCRxClk input high time
EMCRxClk input low time
GMCRefClk input frequency
GMCRefClk period
GMCRefClk input high time
GMCRefClk input low time
PerClk output frequency (for ext. master or sync. slaves)
PerClk period
PerClk output high time
PerClk output low time
UARTSerClk input frequency
UARTSerClk period
UARTSerClk input high time
UARTSerClk input low time
TmrClk input frequency
TmrClk period
TmrClk input high time
TmrClk input low time
Notes:
1. T
2. When the PCI-X interface is used to support a legacy PCI interface, the maximum PCIXClk frequency is 66.66MHz.
maximum OPB clock frequency is 66.66 MHz.
OPB
is the period in ns of the OPB clock. The internal OPB clock runs at 1/2the frequency of the PLB clock. The
Parameter
40% of nominal period
40% of nominal period
35% of nominal period
35% of nominal period
35% of nominal period
35% of nominal period
47% of nominal period
47% of nominal period
50% of nominal period
33% of nominal period
40% of nominal period
40% of nominal period
2T
T
T
40(20)
40(20)
2.5(5)
2.5(5)
OPB
OPB
Min
400
160
160
OPB
7.5
15
10
–
–
–
8
–
–
–
+1
+1
+2
60% of nominal period
60% of nominal period
53% of nominal period
53% of nominal period
66% of nominal period
50% of nominal period
60% of nominal period
60% of nominal period
1000/(2T
400(200)
400(200)
133.33
25(50)
25(50)
66.66
Max
125
100
2.5
–
OPB
–
–
–
–
–
–
–
–
–
–
–
–
1
+2ns)
Units
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Page 55 of 72
Notes
2
1
1
1
1