Chapter 7 Clock Generator; Clock Generator Functions; Clock Generator Configuration - NEC 78014Y Series User Manual

7.1 Clock Generator Functions

The clock generator generates the clock to be supplied to the CPU and peripheral hardware. The following two
types of system clock oscillators are available.
(1) Main system clock oscillator
Oscillates at frequencies of 1.0 to 10.0 MHz. Oscillation can be stopped by executing the STOP instruction or
setting the processor clock control register (PPC).
(2) Subsystem clock oscillator
Oscillates at a frequency of 32.768 kHz. Oscillation cannot be stopped. If the subsystem clock oscillator is not
used, the on-chip feedback resistor can be set to disable by the processor clock control register (PCC). This
enables to decrease power consumption in the STOP mode.

7.2 Clock Generator Configuration

The clock generator consists of the following hardware.
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CHAPTER 7 CLOCK GENERATOR

CHAPTER 7 CLOCK GENERATOR
Table 7-1. Clock Generator Configuration
Item
Control register Processor clock control register (PCC)
Oscillator Main system clock oscillator
Subsystem clock oscillator
Configuration
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