參數(shù)資料
型號: MPC5606SCLQ6R
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 32-BIT, FLASH, 64 MHz, MICROCONTROLLER, PQFP144
封裝: 20 X 20 MM, 1.40 MM HEIGHT, 0.50 MM PITCH, ROHS COMPLIANT, LQFP-144
文件頁數(shù): 106/136頁
文件大?。?/td> 858K
代理商: MPC5606SCLQ6R
MPC5606S Microcontroller Data Sheet, Rev. 7
Freescale Semiconductor
71
3.7.4
Recommended power-up and power-down order
Figure 8 shows the recommended order for powering up the power supplies on this device.
The 1.2 V regulator output starts after the device’s internal POR (VDDREG HV) is deasserted at approximately 2.7 V on
VDDREG.
Figure 8. Recommended order for powering up the power supplies
CAUTION
The voltages VA and VB in Figure 8 must always obey the relation VB VA –0.7V.
Otherwise, currents from the 1.2 V supply to the 3.3 V supply may result.
Figure 9 shows the recommended order for powering down the power supplies on this device.
It is acceptable for the VDD IO HV supply to ramp down faster than the 1.2 V regulator output, even if the latter takes time to
discharge the high 40
F capacitance. (The capacitor will ultimately discharge.)
VDDREG HV supply
VDDREG HV POR (internal)
1.2 V regulator output
Soft startup (approx. 200
s)
VDD IO HV supply (3–5.5 V)
2.7 V
>= 200
s
VA
VB
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