Chapter 25 Clock Monitor; Functions Of Clock Monitor; Configuration Of Clock Monitor; Table 25-1: Configuration Of Clock Monitor - NEC V850E/RS1 User Manual

25.1 Functions of Clock Monitor

The clock monitor samples the main clock (X1 input clock) by using the on-chip Ring-OSC, and
generates a reset request signal when oscillation of the main clock is stopped.
Once the operation of the clock monitor has been enabled by an operation enable flag, it cannot be
cleared to 0 by any means other than reset.
The clock monitor automatically stops under the following conditions.
• While oscillation stabilization time is being counted after software STOP mode is released
• When the main clock (X1 input clock) is stopped
• When the sampling clock is stopped (Ring-OSC)
• When the CPU operates with Ring-OSC

25.2 Configuration of Clock Monitor

Clock monitor consists of the following hardware.
Control register
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Chapter 25 Clock Monitor

Table 25-1: Configuration of Clock Monitor

Item
Clock monitor mode register (CLM)
Figure 25-1: Block Diagram of Clock Monitor
X1 input clock
Ring-OSC clock
User's Manual U16702EE3V2UD00
Configuration
Enable/disable
CLME
Clock monitor mode register (CLM)
Internal reset signal
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