Section 20
LPC Interface (LPC)
Rev. 1.00 Apr. 28, 2008 Page 677 of 994
REJ09B0452-0100
Table 20.11 HIRQ Setting and Clearing Conditions when SCIF Channels are Used
Host Interrupt
Setting Condition
Clearing Condition
HIRQi
(i = 1 to 15)
Internal CPU sets the corresponding
SERIRQ host interrupt request for the
SCIF in SIRQCR4 (for details, see the
description of SIRQCR4).
Changes in the SCIF input signal
DCD
are
detected.
Reads FMSR and clears the DDCD
bit in FMSR
Slave CPU
Master CPU
ODR1 write
Write 1 to IRQ1E1
OBF1 = 0?
Yes
No
No
Yes
All bytes
transferred?
SERIRQ IRQ1 output
SERIRQ IRQ1
source clear
Interrupt initiation
ODR1 read
Hardware operation
Software operation
Figure 20.8 HIRQ Flowchart (Example of Channel 1)
Содержание H8S/2100 Series
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