Infineon TLE984 QX Series, Руководство пользователя

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User Manual 96 Rev. 1.1
2019-03-18
TLE984xQX
Microcontroller with LIN and Power Switches for Automotive Applications
System Control Unit - Digital Modules (SCU-DM)
For different source oscillator, the selection of f
PLL
= 16 MHz, 20 MHz, 25 MHz, 37.5 MHz and 40 MHz is shown in
Table 38 .
Note: For the TLE984xQX, the value of P is configurable. In order to obtain the required f
PLL
, the
values of N and K can be chosen respectively by the bits NDIV and K2DIV for different
oscillator input frequencies. When configuring the required
f
PLL
it has to be ensured that the
limits of parameter f
sys
, f
REF
and f
VCO
are kept.
7.3.3.3 Oscillator Watchdog
The oscillator watchdog monitors the external incoming clock f
OSC
. Only incoming frequencies that are too low
to enable a stable operation of the VCO circuit are detected.
As reference clock the internal oscillator (OSC_PLL) frequency
f
INT
is used and therefore the internal oscillator
must be put into operation.
Table 37 K1 Divisor Table
K1 f
PLL
for f
R
= Duty Cycle
[%]
4 5 6
1 4.0 5.0 6.0 40 - 60
2 2.0 2.5 3.0 50
others not accessible
Table 38 System Frequency
f
PLL
Selected Oscillator f
OSC
N P f
REF
K Actual f
sys
Actual f
VCO
40 MHz On-chip 5 MHz 80 5 1 2 40 MHz 80 MHz
External 4 MHz 80 4 1 2 40 MHz 80 MHz
5 MHz 80 5 1 2 40 MHz 80 MHz
6 MHz 80 6 1 2 40 MHz 80 MHz
37.5 MHz On-chip 5 MHz 90 4 1,25 3 37.5 MHz 112.5 MHz
External 5 MHz 90 4 1,25 3 37.5 MHz 112.5 MHz
25 MHz On-chip 5 MHz 100 5 1 4 25 MHz 100 MHz
External 4 MHz 100 4 1 4 25 MHz 100 MHz
5 MHz 100 5 1 4 25 MHz 100 MHz
6 MHz 100 6 1 4 25 MHz 100 MHz
20 MHz On-chip 5 MHz 80 5 1 4 20 MHz 80 MHz
External 4 MHz 80 4 1 4 20 MHz 80 MHz
5 MHz 80 5 1 4 20 MHz 80 MHz
6 MHz 80 6 1 4 20 MHz 80 MHz
16 MHz On-chip 5 MHz 80 5 1 5 16 MHz 80 MHz
External 4 MHz 80 4 1 5 16 MHz 80 MHz
5 MHz 80 5 1 5 16 MHz 80 MHz
6 MHz 80 6 1 5 16 MHz 80 MHz