TDA3MV Datasheet, PDF (106/256 Pages) Texas Instruments – TDA3x SoC for Advanced Driver Assistance Systems (ADAS) 15mm Package (ABF) Silicon Revision 2.0

TDA3MV, TDA3MA
TDA3LX, TDA3LA
SPRS964C – JUNE 2016 – REVISED JULY 2017
www.ti.com
Table 6-5. OSC1 Crystal Electrical Characteristics (continued)
NAME
DESCRIPTION
t_j(xiosc0)
Frequency accuracy⁽¹⁾, xi_osc1
Ethernet not used
Ethernet RGMII using
derived clock
(1) Crystal characteristics should account for tolerance+stability+aging.
MIN
TYP
MAX
UNIT
±200
ppm
±50
ppm
When selecting a crystal, the system design must take into account the temperature and aging
characteristics of a crystal versus the user environment and expected lifetime of the system.
Table 6-6 details the switching characteristics of the oscillator and the requirements of the input clock.
NAME
f_p
t_sX
Table 6-6. Oscillator Switching Characteristics—Crystal Mode
DESCRIPTION
Oscillation frequency
Start-up time
MIN
TYP
MAX
Range from 19.2 to 32
4
UNIT
MHz
ms
6.1.3.2 OSC1 Input Clock
A 1.8-V LVCMOS-Compatible Clock Input can be used instead of the internal oscillator to provide the
SYS_CLK2 clock input to the system. The external connections to support this are shown in, Figure 6-8.
The xi_osc1 pin is connected to the 1.8-V LVCMOS-Compatible clock sources. The xo_osc1 pin is left
unconnected. The vssa_osc1 pin is connected to board ground (VSS).
Device
xi_osc1
xo_osc1
vssa_osc1
NC
SPRS91v_CLK_06
Figure 6-8. 1.8-V LVCMOS-Compatible Clock Input
Table 6-7 summarizes the OSC1 input clock electrical characteristics.
Table 6-7. OSC1 Input Clock Electrical Characteristics—Bypass Mode
NAME
DESCRIPTION
MIN
TYP
MAX
UNIT
f
Frequency
Range from 12 to 38.4
MHz
C_IN
Input capacitance
I_IN
Input current (3.3V mode)
t_sX
Start-up time⁽¹⁾
2.819
3.019
3.219
pF
4
6
10
µA
See⁽²⁾
ms
(1) To switch from bypass mode to crystal or from crystal mode to bypass mode, there is a waiting time about 100 μs; however, if the chip
comes from bypass mode to crystal mode the crystal will start-up after time mentioned in Table 6-6, t_sX parameter.
(2) Before the processor boots up and the oscillator is set to bypass mode, there is a waiting time when the internal oscillator is in
application mode and receives a wave. The switching time in this case is about 100 μs.
Table 6-8 details the OSC1 input clock timing requirements.
106 Clock Specifications
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