User Manual
225
Rev. 1.1
2019-03-18
TLE984xQX
Microcontroller with LIN and Power Switches for Automotive Applications
System Control Unit - Power Modules (SCU-PM)
8
System Control Unit - Power Modules (SCU-PM)
8.1
Description of the Power Modules System Control Unit
The System Control Unit of the power modules consists of the following sub-modules:
• Clock Watchdog Unit (CWU): supervision of all power modules relevant clocks with NMI signalling.
• Interrupt Control Unit (ICU): all system relevant interrupt flags and status flags.
• Power Control Unit (PCU): takes over control when device enters and exits Sleep and Stop Mode.
• External Watchdog (WDT1): independent system watchdog to monitor system activity
8.2
Introduction
8.2.1
Block Diagram
The System Control Unit of the power modules consists of the sub-modules in the figure shown below:
Figure 38 Block diagram of System Control Unit - Power Modules
IO description of SCU_PM:
CWU (Clock Watchdog Unit)
• check of
f
sys
= system frequency: output of PLL
• check of MI_CLK = measurement interface clock (analog clock): derived out of
f
sys
by division factors
1/2/3/4
SCU_PM_Block_Diagram_Cust.vsd
System Control Unit -Power Modules
PCU
AMBA AHB
on signals to analog
peripherals;
status signals from
analog peripherals
CWU
fsys
MI_CLK
TFILT_CLK
WDT1
ICU
I
N
T
E
R
N
A
L
B
U
S
PREWARN_SUP_NMI
PREWARN_CLK_INT
INT<n:0>
LP_CLK