參數(shù)資料
型號: MPC8245ARVV400D
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 32-BIT, 400 MHz, RISC PROCESSOR, PBGA352
封裝: 35 X 35 MM, 1.65 MM HEIGHT, 1.27 MM PITCH, LEAD FREE, TBGA-352
文件頁數(shù): 15/68頁
文件大小: 1143K
代理商: MPC8245ARVV400D
MPC8245 Integrated Processor Hardware Specifications, Rev. 9
22
Freescale Semiconductor
Electrical and Thermal Characteristics
Figure 11 and Figure 12 show the input/output timing diagrams referenced to SDRAM_SYNC_IN and
PCI_SYNC_IN, respectively.
Figure 11. Input/Output Timing Diagram Referenced to SDRAM_SYNC_IN
Figure 12. Input/Output Timing Diagram Referenced to PCI_SYNC_IN
11a
VM = Midpoint voltage (1.4 V).
Memory
10b-d
Inputs/Outputs
13b
14b
VM
SDRAM_SYNC_IN
Input Timing
Output Timing
12b-d
2.0 V
0.8 V
2.0 V
Tos
11a = Input hold time of SDRAM_SYNC_IN to memory.
12b-d = sys_logic_clk to output valid timing.
13b = Output hold time for non-PCI signals.
14b = SDRAM-SYNC_IN to output high-impedance timing for non-PCI signals.
Tos = Offset timing required to align sys_logic_clk with SDRAM_SYNC_IN. The SDRAM_SYNC_IN signal
sys_logic_clk
VM
PCI_SYNC_IN
VM
is adjusted by the DLL to accommodate for internal delay. This causes SDRAM_SYNC_IN to appear
before sys_logic_clk once the DLL locks.
(after DLL locks)
Shown in 2:1 Mode
Notes:
10b-d = Input signals valid timing.
OVDD ÷ 2
10a
11c
PCI_SYNC_IN
PCI
12a
13a
14a
OVDD ÷ 2
0.4
× OV
DD
0.615
× OV
DD
0.285
× OV
DD
Input Timing
Output Timing
Inputs/Outputs
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