HD6432160 RENESAS [Renesas Technology Corp], HD6432160 Datasheet - Page 589
HD6432160
Manufacturer Part Number
HD6432160
Description
Hitachi 16-Bit Single-Chip Microcomputer
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6432160.pdf
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19.5.2
SMI, HIRQ1, HIRQ6, HIRQ9, HIRQ10, HIRQ11, and HIRQ12
The host interface can request seven kinds of host interrupt by means of SERIRQ. HIRQ1 and
HIRQ12 are used on LPC channel 1 only, while SMI, HIRQ6, HIRQ9, HIRQ10, and HIRQ11 can
be requested from LPC channel 2 or 3.
There are two ways of clearing a host interrupt request.
When the IEDIR bit is cleared to 0 in SIRQCR0, host interrupt sources and LPC channels are all
linked to the host interrupt request enable bits. When the OBF flag is cleared to 0 by a read of
ODR or TWR15 by the host in the corresponding LPC channel, the corresponding host interrupt
enable bit is automatically cleared to 0, and the host interrupt request is cleared.
When the IEDIR bit is set to 1 in SIRQCR0, LPC channel 2 and 3 interrupt requests are dependent
only upon the host interrupt enable bits. The host interrupt enable bit is not cleared when OBF for
channel 2 or 3 is cleared. Therefore, SMIE2, SMIE3A and SMIE3B, IRQ6E2 and IRQ6E3,
IRQ9E2 and IRQ9E3, IRQ10E2 and IRQ10E3, and IRQ11E2 and IRQ11E3 lose their respective
functional differences. In order to clear a host interrupt request, it is necessary to clear the host
interrupt enable bit.
Rev. 2.0, 08/02, page 549 of 788
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