參數(shù)資料
型號： MPC5125YVN400
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 32-BIT, FLASH, 400 MHz, MICROCONTROLLER, PBGA324
封裝： 23 X 23 MM, 2.25 MM HEIGHT, 1 MM PITCH, ROHS COMPLIANT, PLASTIC, MS-034AJJ-1, TEPBGA-324
文件頁數(shù)： 39/92頁
文件大小： 640K
代理商： MPC5125YVN400
MPC5125 Microcontroller Data Sheet, Rev. 3
Electrical and Thermal Characteristics
Freescale Semiconductor
44
The system PLL (SYS_PLL) takes an external reference frequency and generates the internal system clock. The
system clock frequency is determined by the external reference frequency and the settings of the SYS_PLL
configuration.
The e300 core PLL (CORE_PLL) generates a master clock for all of the CPU circuitry. The e300 core clock frequency
is determined by the system clock frequency and the settings of the CORE_PLL configuration.
4.2.1
System Oscillator Electrical Characteristics
The system oscillator can work in oscillator mode or in bypass mode to support an external input clock as clock reference.
Figure 4. Timing Diagram — SYS_XTAL_IN
4.2.2
RTC Oscillator Electrical Characteristics
Table 12. System Oscillator Electrical Characteristics
Characteristic
Sym
Min
Typical
Max
Unit
SpecID
SYS_XTAL frequency
fsys_xtal
15.6
33.3
35.0
MHz
O1.1
Table 13. SYS_XTAL_IN Timing
Sym
Description
Min
Max
Units
SpecID
tCYCLE
SYS_XTALI cycle time1,2
NOTES:
1 The SYS_XTALI frequency and system PLL settings must be chosen such that the resulting system frequencies do not exceed
their respective maximum or minimum operating frequencies. See the MPC5125 Reference Manual (MPC5125RM).
2 The min/max cycle times are calculated using 1/f
sys_xtal (MIN/MAX) where the fsys_xtal (MIN/MAX) (15.6 / 35 MHz) are taken from
Table 12 (system oscillator electrical characteristics).
64.1
28.57
ns
O.1.2
tRISE
SYS_XTALI rise time3
3 Rise time is measured from 20% of VDD to 80% of VDD.
1
4
ns
O.1.3
tFALL
SYS_XTALI fall time4
4 Fall time is measured from 20% of VDD to 80% of VDD.
1
4
ns
O.1.4
tDUTY
SYS_XTALI duty cycle (measured at VM)
5
5 SYS_XTALI duty cycle is measured at V
M.
40
60
%
O.1.5
Table 14. RTC Oscillator Electrical Characteristics
Characteristic
Sym
Min
Typical
Max
Unit
SpecID
RTC_XTAL frequency
frtc_xtal
—
32.768
—
kHz
O2.1
tFALL
tRISE
tCYCLE
SYS_XTAL_I CLK
tDUTY
CVIH
CVIL
VM
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