Fujitsu 8FX User Manual

MB95630H Series
376 FUJITSU SEMICONDUCTOR LIMITED MN702-00009-2v0-E
CHAPTER 20 16-BIT RELOAD TIMER
20.8 Notes on Using 16-bit Reload Timer
20.8 Notes on Using 16-bit Reload Timer
This section provides notes on using the 16-bit reload timer.
■ Notes on Using 16-bit Reload Timer
● Notes on setting the program
• The 16-bit reload timer timer register ch. n (TMRHn/TMRLn) can read the count value
even during the counting operation of the 16-bit reload timer. To read this register, use a
word transfer instruction, or read the upper byte of this register first and then its lower byte.
• A value can be written to the 16-bit reload timer reload register ch. n (TMRLRHn/
TMRLRLn) even during the counting operation of the 16-bit reload timer. To write a value
to this register, use a word transfer instruction, or write the upper byte of this register first
and then its lower byte.
● Notes on interrupts
With the underflow interrupt request enabled (TMCSRLn:INTE = 1), if the underflow interrupt
request flag bit (UF) in the 16-bit reload timer control status register (lower) ch. n (TMCSRLn)
is set to "1", the CPU cannot wake up from the interrupt service routine. Therefore, always
clear the UF bit in the interrupt service routine.

Fujitsu 8FX Specifications

General

Brand	Fujitsu
Model	8FX
Category	Computer Hardware
Language	English