Fujitsu 8FX User Manual

MB95630H Series
MN702-00009-2v0-E FUJITSU SEMICONDUCTOR LIMITED 59
CHAPTER 3 CLOCK CONTROLLER
3.10 Notes on Using Prescaler
3.10 Notes on Using Prescaler
This section provides notes on using the prescaler.
The prescaler operates with the machine clock and the clock generated from the time-base
timer, and keeps operating while those clocks are being supplied. Therefore, in the operation
immediately after a peripheral function is started, an error of up to one cycle of the clock
source captured by that peripheral function will occur, depending on the output value of the
prescaler.
Figure 3.10-1 Clock Capture Error Occurring Immediately after a Peripheral Function Starts
The prescaler count value affects the following peripheral functions:
• 8/16-bit composite timer
• 8/10-bit A/D converter
• 8/16-bit PPG
• 16-bit PPG timer
• 16-bit reload timer
• UART/SIO dedicated baud rate generator
Prescaler output
Start of peripheral function
Clock captured by
peripheral function
Clock capture error
immediately after
a peripheral function starts

Fujitsu 8FX Specifications

General

Brand	Fujitsu
Model	8FX
Category	Computer Hardware
Language	English