Datasheet

Electrical characteristics
i.MX 8M Dual / 8M QuadLite / 8M Quad Applications Processors Data Sheet for Industrial Products, Rev. 0, 01/2018
NXP Semiconductors 27
Table 21 shows the transconductance specification of the oscillator (in mA/V).
Table 22 shows the input clock specifications.
Table 23 shows core output clock specification.
Table 24 shows VIL/VIH specification at EXTAL.
2
Electrical parameters are subject to change.
3
Maximum current is observed during startup. After oscillation is stable, the current from HV supply comes down.
Table 21. Transconductance specification of oscillator
GM_sel Min Max
111 10 25
Table 22. Input clock specification
Parameter Min Typ Max Unit
Clock Frequency in OSC mode 20 — 40 MHz
Input Clock Frequency in Bypass
mode
——50MHz
Input Clock Rise/Fall Time in
Bypass mode
—— 1ns
Input Clock Duty Cycle in Bypass
mode
47.50 50 52.50 %
Table 23. Core output clock specification
Parameter Min Typ Max Unit
Output Clock Frequency in
OSC mode
20 — 40 MHz
Output Clock Duty Cycle in
OSC mode
45 50 55 %
Output Clock Frequency in Bypass
mode
——50MHz
Capacitive Loading on Outputs
Clock
— 150 500 fF
Output Clock Rise/Fall Time in
Bypass mode
—0.10.5ns
Output Clock Duty Cycle in
Bypass mode
40 50 60 %
Table 24. Transconductance specification of oscillator
Parameter Condition Min Max Unit
V
ILEXTAL
V
REF
= 0.5 x avdd
(xosc HV supply)
0V
REF
- 0.5 V
V
IHEXTAL
V
REF
+ 0.5 avdd