Section 19
LPC Interface (LPC)
Rev. 1.00 Mar. 12, 2008 Page 747 of 1178
REJ09B0403-0100
19.4.7
LPC Interface Serialized Interrupt Operation (SERIRQ)
A host interrupt request can be issued from the LPC interface by means of the SERIRQ pin. In a
host interrupt request via the SERIRQ pin, LCLK cycles are counted from the start frame of the
serialized interrupt transfer cycle generated by the host or a peripheral function, and a request
signal is generated by the frame corresponding to that interrupt. The timing is shown in figure
19.10.
IRQ1
IRQ1
Host controller
None
None
SERIRQ
Drive source
LCLK
START
Start frame
IRQ0 frame
IRQ1 frame
IRQ2 frame
SL
or
H
H
R
T
R
S
T
R
S
T
R
S
T
IRQ15
Host controller
None
None
SERIRQ
Driver
LCLK
START
STOP
IOCHCK
frame
Stop frame
Next cycle
IRQ14 frame
IRQ15 frame
R
S
T
R
S
T
R
S
T
R
T
H
I
H = Host control, SL = Slave control, R = Recovery, T = Turnaround, S = Sample
H = Host control, R = Recovery, T = Turnaround, S = Sample, I = Idle
Figure 19.10 SERIRQ Timing
Содержание H8S Family
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