Overview Of Dtp/External Interrupt - Fujitsu F2MCTM-16LX Hardware Manual

CHAPTER 17 DTP/EXTERNAL INTERRUPTS
17.1

Overview of DTP/External Interrupt

The DTP/external interrupt sends interrupt requests from external peripheral devices or
data transfer requests to the CPU to generate an external interrupt request, or starts the
2
EI OS.
DTP/External Interrupt Function
The DTP/external interrupt follows the same procedure as resource interrupts to send interrupt requests
from external peripheral devices to the CPU to generate an external interrupt request, or starts the EI
If the EI
enabled, branching to interrupt processing.
2
If the EI
interrupt processing after the completion of data transfer for the specified number of times.
Table 17.1-1 shows an overview of the DTP/external interrupt.
Table 17.1-1 Overview of DTP/External Interrupt
Input pin
Interrupt factor
Interrupt number
Interrupt control
Interrupt flag
Processing
selection
Processing
contents
314
2
OS is disabled in the interrupt control register (ICR: ISE=0), the external interrupt function is
OS is enabled, the DTP function is enabled and automatic data transfer is performed, branching to
External Interrupt
8 pins : INT8, INT9R, INT10, INT11, INT12R, INT13, INT14R, INT15R
The interrupt factor is set in unit of pins using the detection level setting registers
(ELVR1).
Input of High level, Low level, rising
edge, or falling edge
#26(1A ), #28(1C
H
The interrupt request output is enabled/disabled using the DTP/external interrupt
enable register (ENIR1).
The interrupt factor is held using the DTP/external interrupt factor register (EIRR1).
2
The EI OS is disabled. (ICR: ISE=0)
A branch is caused to the external
interrupt processing routine.
Input of High level or Low level
)
H
The EI
EI
and completes the specified number of
time for data transfers, causing a branch
to the interrupt processing.
DTP Function
2
OS is enabled. (ICR: ISE=1)
2
OS performs automatic data transfer
2
OS.