參數(shù)資料
型號(hào)： MCIMX31_07
廠商： 飛思卡爾半導(dǎo)體(中國(guó))有限公司
英文描述： Multimedia Applications Processors
中文描述： 多媒體應(yīng)用處理器
文件頁(yè)數(shù)： 13/108頁(yè)
文件大小： 1235K
代理商： MCIMX31_07
Electrical Characteristics
i.MX31/i.MX31L Advance Information, Rev. 2.3
Freescale Semiconductor
13
Table 8
provides information for interface frequency limits. For more details about clocks characteristics,
see
Section 4.3.8, “DPLL Electrical Specifications
”
on page 31
and
Section 4.3.3, “Clock Amplifier
Module (CAMP) Electrical Characteristics
on page 19
.
Table 9
shows the fusebox supply current parameters.
6
For normal operating conditions, PLLs’ and core supplies must maintain the following relation: PLL
≥
Core – 100 mV. In other
words, for a 1.6 V core supply, PLL supplies must be set to 1.5 V or higher. PLL voltage must not be altered after power up,
otherwise the PLL will be unstable and lose lock. To minimize inducing noise on the PLL supply line, source the voltage from
a low-noise, dedicated supply.
7
Fuses might be inadvertently blown if written to while the voltage is below this minimum.
Table 8. Interface Frequency
ID
Parameter
Symbol
Min
Typ
Max
Units
1
JTAG TCK Frequency
f
JTAG
DC
5
10
MHz
2
CKIL Frequency
1
1
CKIL must be driven by an external clock source to ensure proper start-up and operation of the device. CKIL is needed to
clock the internal reset synchronizer, the watchdog, and the real-time clock.
2
DPTC functionality, specifically the voltage/frequency relation table, is dependent on CKIH frequency. At the time of
publication, standard tables used by Freescale OSs provided for a CKIH frequency of 26 MHz only. Any deviation from this
frequency requires an update to the OS. For more details, refer to the particular OS user's guide documentation.
f
CKIL
32
32.768
38.4
kHz
3
CKIH Frequency
2
f
CKIH
15
26
75
MHz
Table 9. Fusebox Supply Current Parameters
Ref. Num
Description
Symbol
Minimum
Typical
Maximum
Units
1
eFuse Program Current.
1
Current to program one eFuse bit: efuse_pgm = 3.0V
1
The current I
program
is during program time (t
program
).
2
The current I
read
is present for approximately 50 ns of the read access to the 8-bit word.
I
program
–
35
60
mA
2
eFuse Read Current
2
Current to read an 8-bit eFuse word
vdd_fusebox = 1.875V
I
read
–
5
8
mA
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