Omron 3G8F7-CRM21, User Manual

Page: 124 / 238

104
PCI Register Specifications
Section B-2
B-2-4 Interrupt Control Register (Interrupt from PC to Board)
This register is used to make an interrupt request from the PC to the Board.
When you use the Interrupt Trigger register and set the flag to cause into 1, an
interrupt occurs on the Board.
The Interrupt Request Confirmation register causes an interrupt. The flag of
the cause remains 1, until the interrupt cause is cleared by the Board.
When you use the Interrupt Trigger register to have an interrupt, be sure the
interrupt cause flag to have in the Interrupt Request Confirmation register is 0.
This must be 0 before an interrupt is triggered.
Flags of "Interrupt
from PC to Board"
Interrupt Trigger
(Offset 0x0002)
Interrupt Request
confirmation (Offset
0x0003)
Flag Bit Description
CMD 0 The PC issues a command request to the Board.
BD_SND_ACK 1 The PC gives an acknowledgment to an event
transmission request made by the Board to the PC.
SND 2 The PC notifies the Board of an event transmission.
REQ_REF 5 The PC instructs the Board to release an access
right to cyclic area.
REQ_ACC 6 The PC requests the Board for an access right to the
cyclic area.
PC_WDT 7 When the Board firmware monitors normal operation
of PC by PC_WDT, the PC refreshes the WDT.
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
Flag PC_WDT REQ_ACC REQ_REF Unused Unused SND BD_SND_A
CK
CMD
Access rule W W W W W W W W
Initial value - - - - - - - -
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
Flag PC_WDT REQ_ACC REQ_REF Unused Unused SND BD_SND_A
CK
CMD
Access rule R R R R R R R R
Initial value 0 0 0 0 0 0 0 0