mc68hc05l25 Freescale Semiconductor, Inc, mc68hc05l25 Datasheet - Page 46

• Manufacturer Part Number: mc68hc05l25
• Description: M68hc05 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Interrupts
6.7 Serial Peripheral Interface Interrupt (SPII)
The SPII is generated by the serial peripheral interface system at the end of one byte of data transmission
or reception. The I bit in the CCR must be clear and the SPIE bit of SPCR must be set for the SPII to be
generated. This interrupt will vector to the interrupt service routine located at the address specified by the
contents of memory locations $1FF2 and $1FF3. See
information.
6.8 Event Counter Interrupt (EVI)
The EVI interrupt is generated by the event counter system. The I bit in the CCR must be clear for the EVI
interrupt to be enabled. This interrupt will vector to the interrupt service routine located at the address
specified by the contents of memory locations $1FF4 and $1FF5. See
information.
6.9 Time Base Interrupt (TBI)
The TBI is generated periodically by the time base system. The I bit in the CCR must be clear for the TBI
to be enabled. This interrupt will vector to the interrupt service routine located at the address specified by
the contents of memory locations $1FF0:$1FF1. See
6.10 Key Wakeup Interrupt (KWI)
The KWI interrupt is generated by the key wakeup system. The I bit in the CCR must be clear for the KWI
interrupt to be enabled. This interrupt will vector to the interrupt service routine located at the address
specified by the contents of memory locations $1FF8 and $1FF9. See
for more information.
6.11 IRQ/KWI Software Consideration
IRQ and KWI interrupts have a timing delay in a case as shown in
programming for proper interrupts with IRQ or KWI.
Figure 6-4
TOIE (timer overflow interrupt enable) bit is set.
46
shows an example of a timer interrupt. In this case, the interrupt by TOF occurs as soon as
.
.
CLI
BSET TOIE, TCR
LDA
.
.
.
#$55
MC68HC05L25 Data Sheet, Rev. 3.1
Figure 6-4. Timer Interrupt
TOF Interrupt pending
Interrupt occurs before this instruction
Chapter 9 Time Base
Chapter 10 Serial Peripheral Interface
Figure
Chapter 13 Event Counter
Chapter 7 Input/Output Ports (I/O)
6-5. This section shows
for more information.
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