參數(shù)資料
型號： MPC8245TZU300D
廠商： Freescale Semiconductor
文件頁數(shù)： 17/68頁
文件大?。?/td> 0K
描述： IC MPU 32BIT 300MHZ 352-TBGA
標(biāo)準(zhǔn)包裝： 24
系列： MPC82xx
處理器類型： 32-位 MPC82xx PowerQUICC II
速度： 300MHz
電壓： 1.8V
安裝類型： 表面貼裝
封裝/外殼： 352-LBGA
供應(yīng)商設(shè)備封裝： 352-TBGA（35x35）
包裝： 托盤
MPC8245 Integrated Processor Hardware Specifications, Rev. 10
24
Freescale Semiconductor
Electrical and Thermal Characteristics
Figure 14 provides the AC test load for the MPC8245.
Figure 14. AC Test Load for the MPC8245
14b
sys_logic_clk to output high impedance (for all others)
—
4.0
ns
2
Notes:
1. All PCI signals are measured from GVDD/2 of the rising edge of PCI_SYNC_IN to 0.285 × OVDD or 0.615 × OVDD of the
signal in question for 3.3 V PCI signaling levels. See Figure 12.
2. All memory and related interface output signal specifications are specified from the VM = 1.4 V of the rising edge of the
memory bus clock, sys_logic_clk to the TTL level (0.8 or 2.0 V) of the signal in question. sys_logic_clk is the same as
PCI_SYNC_IN in 1:1 mode, but is twice the frequency in 2:1 mode (processor/memory bus clock rising edges occur on every
rising and falling edge of PCI_SYNC_IN). See Figure 11.
3. PCI bused signals are composed of the following signals: LOCK, IRDY, C/BE[3:0], PAR, TRDY, FRAME, STOP, DEVSEL,
PERR, SERR, AD[31:0], REQ[4:0], GNT[4:0], IDSEL, and INTA.
4. To meet minimum output hold specifications relative to PCI_SYNC_IN for both 33- and 66-MHz PCI systems, the MPC8245
has a programmable output hold delay for PCI signals (the PCI_SYNC_IN to output valid timing is also affected). The initial
value of the output hold delay is determined by the values on the MCP and CKE reset configuration signals; the values on
these two signals are inverted and stored as the initial settings of PCI_HOLD_DEL = PMCR2[5, 4] (power management
configuration register 2 <0x72>), respectively. Since MCP and CKE have internal pull-up resistors, the default value of
PCI_HOLD_DEL after reset is 0b00. Further output hold delay values are available by programming the PCI_HOLD_DEL
value of the PMCR2 configuration register. Figure 15 shows the PCI_HOLD_DEL effect on output valid and hold times.
Table 11. Output AC Timing Specifications (continued)
Num
Characteristic
Min
Max
Unit
Notes
Output
Z0 = 50 Ω
OVDD/2 for PCI
RL = 50 Ω
Output Measurements are Made at the Device Pin
GVDD/2 for Memory
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