參數(shù)資料
型號(hào): MCIMX257CJN4A
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, MICROPROCESSOR, PBGA347
封裝: 12 X 12 MM, 0.50 MM PITCH, ROHS COMPLIANT, PLASTIC, MAPBGA-347
文件頁數(shù): 35/154頁
文件大小: 1498K
代理商: MCIMX257CJN4A
i.MX25 Applications Processor for Consumer and Industrial Products, Rev. 8
Freescale Semiconductor
13
3.1.3
Fusebox Supply Current Parameters
Table 7 lists the fusebox supply current parameters.
3.1.4
Interface Frequency Limits
Table 8 provides information for interface frequency limits.
Table 9 provides the recommended external crystal specifications.
Table 9. Recommended External Crystal Specifications
Table 10 provides the recommended external reference clock oscillator specifications (when reference is
used from an external clock source).
Table 10. Recommended External Reference Clock Specifications
Table 7. Fusebox Supply Current Parameters
Parameter
Symbol
Min.
Typ.
Max.
Units
eFuse program current1
Current to program one eFuse bit
The associated VDD_FUSE supply = 3.6 V
1 The current I
program is during program time (tprogram).
Iprogram
26
35
62
mA
eFuse read current2
Current to read an 8-bit eFuse word
2 The current I
read is present for approximately 50 ns of the read access to the 8-bit word.
Iread
—12.5
15
mA
Table 8. Interface Frequency Limits
Parameter
Min.
Typ.
Max.
Units
JTAG: TCK Frequency of Operation
DC
5
10
MHz
OSC24M_XTAL Oscillator
24
MHz
OSC32K_XTAL Oscillator
32.768
KHz
24 MHz
32.768 KHz
Frequency Tolerance
<=
± 30 ppm
<=
± 30 ppm
ESR
< 80 Ohm
50 K~60 K
Load Capacitor
8 pF–12 pF
6 pF–8 pF (12 pF–16 pF on each pin)
Shunt Capacitor
< 7 pF
1 pF
Drive Level
> 150 W
> 1 W
24 MHz
32.768 KHz
Voh
min = 0.7* VDD
Vol
max = 0.3* VDD
Frequency Tolerance
= 30 ppm
Trise
1% Tclock
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