KS57C2308/P2308/C2316/P2316 OSCILLATOR CIRCUITS
6-1
6OSCILLATOR CIRCUITS
OVERVIEW
The KS57C2308/C2316 microcontroller has two oscillator circuits: a main system clock circuit, and a subsystem
clock circuit. The CPU and peripheral hardware operate on the system clock frequency supplied through these
circuits. Specifically, a clock pulse is required by the following peripheral modules:
—LCD controller
—Basic timer
—Timer/counter 0
—Watch timer
—Clock output circuit
—Serial I/O interface
CPU Clock Notation
In this document, the following notation is used for descriptions of the CPU clock:
fx Main system clock
fxt Subsystem clock
fxx Selected system clock