Section 17 Serial Communication Interface with FIFO (SCIF)
Rev. 1.00 Apr. 28, 2008 Page 500 of 994
REJ09B0452-0100
17.3.7 Interrupt
Identification Register (FIIR)
FIIR consists of bits that identify interrupt sources. For details, see table 17.4.
Bit
Bit Name
Initial Value
R/W
Description
7
6
FIFOE1
FIFOE0
0
0
R
R
FIFO Enable 1, 0
These bits indicate the transmit/receive FIFO setting.
00: Transmit/receive FIFOs disabled
11: Transmit/receive FIFOs enabled
5, 4
All
0 R
Reserved
These bits are always read as 0 and cannot be
modified.
3
2
1
INTID2
INTID1
INTID0
0
0
0
R
R
R
Interrupt ID2, ID1, ID0
These bits Indicate the interrupt of the highest
priority among the pending interrupts.
000: Modem status
001: FTHR empty
010: Receive data ready
011: Receive line status
110: Character timeout (when the FIFO is enabled)
0 INTPEND
1
R Interrupt
Pending
Indicates whether one or more interrupts are
pending.
0: Interrupt pending
1: No interrupt pending
Содержание H8S/2100 Series
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