NEC NEC PD78081(A), User Manual

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CHAPTER 5 CLOCK GENERATOR
CHAPTER 5 CLOCK GENERATOR
5.1 Clock Generator Functions
The clock generator generates the clock to be supplied to the CPU and peripheral hardware. The following type
of system clock oscillator is available.
Main system clock oscillator
This circuit oscillates at frequencies of 1 to 5.0 MHz. Oscillation can be stopped by executing the STOP instruction.
5.2 Clock Generator Configuration
The clock generator consists of the following hardware.
Table 5-1. Clock Generator Configuration
Item Configuration
Control register Processor clock control register (PCC)
Oscillation mode selection register (OSMS)
Oscillator Main system clock oscillator