Dear All,
Hello. The XTALI Vih spec is below from IMX6DQAEC(Rev.4).
XTALI high-level DC input voltage (Vih) : 0.8 x NVCC_PLL_OUT [Min]
But, the current customer's system was below.
- NVCC_PLL_OUT: 1.1V
- VIH: 0.87V --> (= 0.79 x NVCC_PLL_OUT)
My customer must remove the 2.2 M-ohm resistor to meet the DC spec.
On the one hand, the 2.2 M-ohm resistor must need for ERR005777 in Chip errata.
[Question]
Is it possible to be permissible the VIH (=0.87V) in MX6DQ?
(Oscillator maker answered that matching is OK and 2.2M-ohm shouldn't be removed for ERR005777.)
Best Regards,
Keita
已解决! 转到解答。
Hello,
According to Table 2-7 (Oscillator and clock recommendations) of the
"Hardware Development Guide ", XTALI VIL and VIH voltage levels, in the
latest i.MX6 series datasheet concern with External megahertz source,
If feeding an external clock into the device.
For oscillator :
"Connect a fundamental-mode crystal between XTALI
and XTALO. An 80 Ω typical ESR crystal rated for a
maximum drive level of 250 μW is acceptable.
Alternately, a 50 Ω typical ESR crystal rated for a
maximum drive level of 200 μW may be used. See the
engineering bulletin EB830 on www.freescale.com for
additional options."
Have a great day,
Yuri
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Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------
Hello,
According to Table 2-7 (Oscillator and clock recommendations) of the
"Hardware Development Guide ", XTALI VIL and VIH voltage levels, in the
latest i.MX6 series datasheet concern with External megahertz source,
If feeding an external clock into the device.
For oscillator :
"Connect a fundamental-mode crystal between XTALI
and XTALO. An 80 Ω typical ESR crystal rated for a
maximum drive level of 250 μW is acceptable.
Alternately, a 50 Ω typical ESR crystal rated for a
maximum drive level of 200 μW may be used. See the
engineering bulletin EB830 on www.freescale.com for
additional options."
Have a great day,
Yuri
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------