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XC7445B Datasheet(PDF) 30 Page - Freescale Semiconductor, Inc

Part No. XC7445B
Description  RISC Microprocessor Hardware Specifications
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Manufacturer  FREESCALE [Freescale Semiconductor, Inc]
Direct Link  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

XC7445B Datasheet(HTML) 30 Page - Freescale Semiconductor, Inc

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MPC7455 RISC Microprocessor Hardware Specifications, Rev. 4.1
30
Freescale Semiconductor
Electrical and Thermal Characteristics
Figure 12 shows the L3 bus timing diagrams for the MPC7455 interfaced to PB2 or late write SRAMs.
Figure 12. L3 Bus Timing Diagrams for Late Write or PB2 SRAMs
5.2.5
IEEE 1149.1 AC Timing Specifications
Table 14 provides the IEEE 1149.1 (JTAG) AC timing specifications as defined in Figure 14 through Figure 17.
Table 14. JTAG AC Timing Specifications (Independent of SYSCLK) 1
At recommended operating conditions. See Table 4.
Parameter
Symbol
Min
Max
Unit
Notes
TCK frequency of operation
fTCLK
0
33.3
MHz
TCK cycle time
t TCLK
30
ns
TCK clock pulse width measured at 1.4 V
tJHJL
15
ns
TCK rise and fall times
tJR and tJF
02
ns
TRST assert time
tTRST
25
ns
2
Input setup times:
Boundary-scan data
TMS, TDI
tDVJH
tIVJH
4
0
ns
3
Input hold times:
Boundary-scan data
TMS, TDI
tDXJH
tIXJH
20
25
ns
3
L3_ECHO_CLK[0,2]
L3 Data and Data
VM
VM = Midpoint Voltage (GVDD/2)
tL3DVEH
tL3DXEH
Parity Inputs
L3_CLK[0,1]
ADDR, L3_CNTL
VM
tL3CHOV
tL3CHOX
VM
L3DATA WRITE
tL3CHDZ
Outputs
Inputs
L3_ECHO_CLK[1,3]
tL3CHDV
tL3CHDX
tL3CHOZ


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