参数资料
型号: MPC5200VR466BR2
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 466 MHz, MICROPROCESSOR, PBGA272
封装: 27 X 27 MM, 1.27 MM PITCH, ROHS COMPLIANT, PLASTIC, BGA-272
文件页数: 19/80页
文件大小: 788K
代理商: MPC5200VR466BR2
MPC5200B Data Sheet, Rev. 0.6
Electrical and Thermal Characteristics
Freescale Semiconductor
26
3. REQ# and GNT# are point-to-point signals and have different input setup times than do bused signals. GNT# and REQ#
have a setup of 5 ns at 66 MHz. All other signals are bused.
4. See the timing measurement conditions in the PCI Local Bus Specification [4].
For Measurement and Test Conditions, see the PCI Local Bus Specification [4].
3.3.7
Local Plus Bus
The Local Plus Bus is the external bus interface of the MPC5200B. A maximum of eight configurable chip
selects (CS) are provided. There are two main modes of operation: non-MUXed (Legacy and Burst) and
MUXED. The reference clock is the PCI CLK. The maximum bus frequency is 66 MHz.
Definition of Acronyms and Terms:
WS = Wait State
DC = Dead Cycle
LB = Long Burst
DS = Data Size in Bytes
tPCIck = PCI clock period
tIPBIck = IPBI clock period
Figure 10. Timing Diagram—IPBI and PCI clock (example ratio: 4:1)
3.3.7.1
Non-MUXed Mode
Table 24. Non-MUXed Mode Timing
Sym
Description
Min
Max
Units
Notes
SpecID
tCSA
PCI CLK to CS assertion
4.6
10.6
ns
A7.1
tCSN
PCI CLK to CS negation
2.9
7.0
ns
A7.2
t1
CS pulse width
(2+WS)*tPCIck
ns
(1)
A7.3
t2
ADDR valid before CS assertion
tIPBIck
tPCIck
ns
A7.4
t3
ADDR hold after CS negation
tIPBIck
-ns
(2)
A7.5
t4
OE assertion before CS assertion
-
4.8
ns
A7.6
t5
OE negation before CS negation
-
2.7
ns
A7.7
t6
RW valid before CS assertion
tPCIck
-ns
A7.8
t7
RW hold after CS negation
tIPBIck
-ns
A7.9
t8
DATA output valid before CS assertion
tIPBIck
-
ns
A7.10
t9
DATA output hold after CS negation
tIPBIck
-
ns
A7.11
t10
DATA input setup before CS negation
8.5
-
ns
A7.12
PCI CLK
IPBI CLK
tIPBIck
tPCIck
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