参数资料
型号: MPC8245TZU266D
厂商: Freescale Semiconductor
文件页数: 15/68页
文件大小: 0K
描述: IC MPU 32BIT 266MHZ PPC 352-TBGA
标准包装: 24
系列: MPC82xx
处理器类型: 32-位 MPC82xx PowerQUICC II
速度: 266MHz
电压: 1.8V
安装类型: 表面贴装
封装/外壳: 352-LBGA
供应商设备封装: 352-TBGA(35x35)
包装: 托盘
MPC8245 Integrated Processor Hardware Specifications, Rev. 10
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
× OVDD
0.285
× OVDD
Input Timing
Output Timing
Inputs/Outputs
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