Datasheet

i.MX 8M Dual / 8M QuadLite / 8M Quad Applications Processors Data Sheet for Industrial Products, Rev. 0, 01/2018
56 NXP Semiconductors
Electrical characteristics
3.9.7.2 MIPI LP-TX specifications
Table 51. MIPI high-speed transmitter AC specifications
Symbol Parameter Min Typ Max Unit
V
CMTX(HF)
Common-level variations above 450 MHz — — 8 mV
RMS
V
CMTX(LF)
Common-level variation between 50-450 MHz — — 10 mV
PEAK
t
R
and t
F
1
1
UI is the long-term average unit interval.
Rise Time and Fall Time (20% to 80%) 160 — 0.3 UI ps
Table 52. MIPI low-power transmitter DC specifications
Symbol Parameter Min Typ Max Unit
V
OH
1
1
This specification can only be met when limiting the core supply variation from 1.1 V to 1.3 V.
Thevenin Output High Level 1.1 1.2 1.3 V
V
OL
Thevenin Output Low Level -50 — 50 mV
Z
OLP
2
2
Although there is no specified maximum for Z
OLP
, the LP transmitter output impedance ensures the T
RLP
/T
FLP
specification
is met.
Output Impedance of Low Power Transmitter 110 — —

Table 53. MIPI low-power transmitter AC specifications
Symbol Parameter Min Typ Max Unit
T
RLP
/T
FLP
1
1
C
LOAD
includes the low equivalent transmission line capacitance of TX and RX are assumed to always be < 10 pF. The
distributed line capacitance can be up to 50 pF for a transmission line with 2 ns delay.
15% to 85% Rise Time and Fall Time — — 25 ns
T
REOT
1,2,3
2
The rise-time of T
REOT
starts from the HS common-level at the moment when the differential amplitude drops below 70 mV,
due to stopping of the differential drive.
3
With an additional load capacitance CCM between 0 to 60 pF on the termination center, tap at RX side of the lane.
30% to 85% Rise Time and Fall Time — — 35 ns
T
LP-PULSE-TX
4
4
This parameter value can be lower than TLPX, due to differences in rise vs. fall signal slopes, trip levels, and mismatches
between Dp and Dn LP transmitters. Any LP exclusive-OR pulse observed during HS EoT (transition from HS level to LP-11)
is glitch behavior as described in Low-Power Receiver section.
Pulse width of the LP exclusive-OR clock: First LP exclusive-OR
clock pulse after Stop state or last pulse before Stop state
40 — — ns
Pulse width of the LP exclusive-OR clock: All other pulses 20 — — ns
T
LP-PER-TX
Period of the LP exclusive-OR clock 90 — — ns
V/t
SR
1,5,6,7
Slew Rate @ C
LOAD
= 0 pF 30 — 500 mV/ns
Slew Rate @ C
LOAD
= 5 pF 30 — 200 mV/ns
Slew Rate @ C
LOAD
= 20 pF 30 — 150 mV/ns
Slew Rate @ C
LOAD
= 70 pF 30 — 100 mV/ns
C
LOAD
Load Capacitance 0 — 70 pF