Fujitsu 8FX User Manual

MB95630H Series
MN702-00009-2v0-E FUJITSU SEMICONDUCTOR LIMITED 339
CHAPTER 19 16-BIT PPG TIMER
19.5 Interrupts
19.5 Interrupts
The 16-bit PPG timer can generate interrupt requests in the following cases:
• When a trigger or counter borrow occurs
• When a rising edge of PPG is generated in normal polarity
• When a falling edge of PPG is generated in inverted polarity
The interrupt operation is controlled by the IRS[1:0] bits in the PCNTLn register.
■ Interrupts of 16-bit PPG Timer
Table 19.5-1 shows interrupt control bits and interrupt sources of the 16-bit PPG timer.
When the IRQF bit in the 16-bit PPG status control register (PCNTLn) is set to "1" and
interrupt requests are enabled (PCNTLn:IREN = 1) in the 16-bit PPG timer, an interrupt
request is generated and output to the controller.
Table 19.5-1 Interrupt Control Bits and Interrupt Sources of 16-bit PPG Timer
Item Description
Interrupt flag bit PCNTLn:IRQF
Interrupt request enable bit PCNTLn:IREN
Interrupt type select bits PCNTLn:IRS[1:0]
Interrupt sources
PCNTLn:IRS[1:0] = 0b00
Hardware trigger by TRGn pin input of 16-bit downcounter, software
trigger and retrigger
PCNTLn:IRS[1:0] = 0b01
Counter borrow of 16-bit downcounter
PCNTLn:IRS[1:0] = 0b10
Rising edge of PPGn output in normal polarity, or falling edge of PPGn
output in inverted polarity
PCNTLn:IRS[1:0] = 0b11
Counter borrow of 16-bit downcounter, rising edge of PPGn output in
normal polarity, or falling edge of PPGn output in inverted polarity

Fujitsu 8FX Specifications

General

Brand	Fujitsu
Model	8FX
Category	Computer Hardware
Language	English