M16C6K9 Datasheet, PDF (170/292 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

M16C/6K9 Group
Serial Interrupt Output
q IRQ request register i IRQRi (i=1-4)
The serial interrupt request of Channel 1-4 is set by software, or asserting frame is selected.
•IRQ request bit IR
Setting the bit to “1” generates the serial interrupt request.
By setting the OBFj sync enable bit (bit2-4, j=1-3) of the serial interrupt control register0 to “1”, the
value of IR is the same as that of OBFj, which is the host bus interface internal signal. When the
internal signal OBFj is “1”, the serial interrupt is generated.
IR is cleared to “0” by writing “0” in software.
IR can not be cleared to “0” by software when the internal signal OBFj is “1” if OBFj sync enable
bit is set to “1”.
q IRQ select bit IS0-4
The asserting frame is selected.
IRQ request register1-4
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
IRQR1
IRQR2
IRQR3
IRQR4
Address
02B316
02B416
02B516
02B616
Bit symbol
Bit name
IS0
Frame select bit
IS1
IS2
IS3
IS4
When reset
0016
0016
0016
0016
Function
b4b3b2b1b0 IRQ Frame
0 0 0 0 0 : No SERIRQ output
0 0 0 0 1 : Frame 1
0 0 0 1 0 : Frame 2
0 0 0 1 1 : Frame 3
0 0 1 0 0 : Frame 4
0 0 1 0 1 : Frame 5
0 0 1 1 0 : Frame 6
0 0 1 1 1 : Frame 7
0 1 0 0 0 : Frame 8
0 1 0 0 1 : Frame 9
0 1 0 1 0 : Frame 10
0 1 0 1 1 : Frame 11
0 1 1 0 0 : Frame 12
0 1 1 0 1 : Frame 13
0 1 1 1 0 : Frame 14
0 1 1 1 1 : Frame 15
1 0 0 0 0 : Can’t select
1 0 0 0 1 : Can’t select
1 0 0 1 0 : Can’t select
1 0 0 1 1 : Can’t select
1 0 1 0 0 : Can’t select
1 0 1 0 1 : Extend Frame 0
1 0 1 1 0 : Extend Frame 1
1 0 1 1 1 : Extend Frame 2
1 1 0 0 0 : Extend Frame 3
1 1 0 0 1 : Extend Frame 4
1 1 0 1 0 : Extend Frame 5
1 1 0 1 1 : Extend Frame 6
1 1 1 0 0 : Extend Frame 7
1 1 1 0 1 : Extend Frame 8
1 1 1 1 0 : Extend Frame 9
1 1 1 1 1 : Extend Frame 10
RW
IR
IRQ request bit
0: No IRQ request
1: IRQ request
Nothing is assigned.
Meaningless in writing, “0” in reading.
Fig.SI-3 Configuration of IRQ request register1-4
Rev.1.00 Jun 06, 2003 page 170 of 290