XPC7445 Freescale Semiconductor, XPC7445 Datasheet - Page 4

• Manufacturer Part Number: XPC7445
• Description: RISC Microprocessor Hardware Specifications
• Manufacturer: Freescale Semiconductor

General Parameters
General Parameters
Table 8 provides the clock AC timing specifications for the MPC7455 part numbers described herein.
Table 12 provides the L3 bus interface AC timing specifications for MSUG2 for the MPC7455 part numbers
described herein.
4
At recommended operating conditions. See Table 4.
At recommended operating conditions. See Table 4.
Processor frequency
VCO frequency
Notes:
1. Caution: The SYSCLK frequency, PLL_CFG[0:4] settings must be chosen such that the resulting SYSCLK (bus)
L3_CLK rise and
fall time
Setup times:
Input hold times:
Valid times:
Valid times:
Output hold times:
Output hold times:
L3_CLK to high
impedance:
Data and parity
Data and parity
Data and parity
All other outputs
Data and parity
All other outputs
Data and parity
frequency, CPU (core) frequency, and PLL (VCO) frequency do not exceed their respective maximum or minimum
operating frequencies (see Table 4 in the MPC7455 RISC Microprocessor Hardware Specifications). Refer to the
PLL_CFG[0:4] signal description in Section 1.9.1, “PLL Configuration,” for valid PLL_CFG[0:4] settings.
Parameter
Characteristic
MPC7455 Part Number Specification for the XPC74x5RXnnnNx Series
Table 12. L3 Bus Interface AC Timing Specifications for MSUG2
Symbol
t
t
t
t
t
t
t
t
t
t
t
L3DVEH
L3CHDV
L3CLDX,
L3DXEH
L3CHOV
L3CHDX
L3CHOX
L3DVEL
L3DXEL
L3CLDV
L3CLDZ
t
t
L3CR
L3CF
,
,
,
,
,
Symbol
Freescale Semiconductor, Inc.
L2CR[12] = 0 and L3CR[12] = 0
t
t
t
f
f
L3_ECHO_CLK
L3_CLK
L3_CLK
VCO
core
For More Information On This Product,
Table 8. Clock AC Timing Specifications
+ 0.6
–0.1
Min
—
—
—
—
/4 – 0.4
/4 – 0.5
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1000
Min
500
/4
600 MHz
t
Maximum Processor Core Frequency
L3_CLK
(– t
t
L3_CLK
1200
Max
600
L3_CLK
+ 0.4
Max
1.0
—
—
—
—
All Speed Grades
/4 + 1.0
/2
/4)
1000
Min
500
8
733 MHz
L2CR[12] = 1 and L3CR[12] = 1
t
t
t
L3_ECHO_CLK
L3_CLK
L3_CLK
1466
Max
+0.6
–0.1
733
Min
—
—
—
—
/4 – 0.2
/4 – 0.3
/4
1000
Min
500
800 MHz
t
L3_CLK
(– t
t
L3_CLK
L3_CLK
+ 0.8
Max
1.0
1600
—
—
—
—
Max
800
/4 + 1.2
/2
/4)
8
MHz
Unit
MHz
MOTOROLA
Unit Notes
ns
ns
ns
ns
ns
ns
ns
ns
Notes
2, 3, 4
5, 6, 7
5, 6, 7
2, 4
5, 7
5, 7
1
1
1