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CLOCK_XMC4
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Architecture Description
The above figure 1 represents the internal software architecture of the CLOCK_XMC4 APP. A CLOCK_XMC4 APP instance exists in a DAVE™ project with fixed attributes as shown. The APP configures SCU clock module, and conditionally GPIO module to monitor a various clocks. This in addition requires the consumption of the CPU_CTRL_XMC4 APP for handling the NMI trap based on trap event selection in event settings page of CLOCK_XMC4 APP GUI.
CLOCK_XMC4 is used by use-case APPs like: UART, PWM, SPI, CAN (top level) APPs.
Signals:
The following table presents the signals provided by the APP for connection. It also gives the flexibility to configure and extend the connectivity to other APPs.
Table 1: APP I0 signals
| Signal Name | Input/Output | Availability | Description |
| clk_ccu_output | Output | Always | Clock input to CCU4, CCU8 and POSIF modules |
| clk_perbridge_output | Output | Always | Clock input to DSD module |
Figure 2 explains the preferred way of clock initialization sequence, and is being used in SCU low-level driver.
