m30833fjgp Renesas Electronics Corporation., m30833fjgp Datasheet - Page 128

• Manufacturer Part Number: m30833fjgp
• Description: Renesas 16/32-bit Single-chip Microcomputer M16c Family / M32c/80 Series
• Manufacturer: Renesas Electronics Corporation.

R
R
M
10.7 INT Interrupt
e
E
3
. v
J
Figure 10.10 IFSR Register
2
0
External input generates the INTi interrupt (i = 0 to 5). The LVS bit in the INTiIC register selects either edge
sensitive triggering to generate an interrupt on any edge or level sensitive triggering to generate an inter-
rupt at an applied signal level. The POL bit in the INTiIC register determines the polarity.
With an edge sensitive triggering, when the IFSRi bit in the IFSR register is set to "1" (both edges), an
interrupt occurs on both rising and falling edges of the external input. If the IFSRi bit is set to "1", set the
POL bit in the corresponding register to "0" (falling edge).
With a level sensitive triggering, set the IFSRi bit to "0" (single edge). When the INTi pin input level reaches
the level set in the POL bit, the IR bit in the INTiIC register is set to "1". The IR bit remains set to "1" even
if the INTi pin level is changed. The IR bit is set to "0" when the INTi interrupt is acknowledged or when "0"
is written by program.
Figure 10.10 shows the IFSR register.
1
C
9
3 .
B
8 /
0
1
______
3
0
3
_______
J
G
4
a
0 -
n
o r
External Interrupt Request Cause Select Register
b7
3 .
1
NOTES:
u
, 1
3
p
b6
1
1.Set this bit to "0" to select level sensitive.
2
(
M
0
b5
When setting this bit to "1", set the POL bit in the INTilC register (i = 0 to 5) to "0" (falling edge).
0
3
6
2
b4
C
8 /
Page 105
b3
, 3
b2
M
b1
3
2
b0
C
______
f o
8 /
4
3
Symbol
IFSR7
IFSR6
8
IFSR0
IFSR2
IFSR4
IFSR5
IFSR1
IFSR3
) T
8
Bit
Symbol
IFSR
INT0 Interrupt Polarity
Select Bit
INT1 Interrupt Polarity
Select Bit
INT2 Interrupt Polarity
Select Bit
INT3 Interrupt Polarity
Select Bit
INT4 Interrupt Polarity
Select Bit
INT5 Interrupt Polarity
Select Bit
UART0, UART3
Interrupt Cause Select
Bit
UART1, UART4
Interrupt Cause Select
Bit
Bit Name
(1)
(1)
(1)
(1)
(1)
(1)
Address
031F
16
0 : UART3 bus conflict, start condition
1 : UART0 bus conflict, start condition
0 : UART4 bus conflict, start condition
1 : UART1 bus conflict, start condition
0 : One edge
1 : Both edges
0 : One edge
1 : Both edges
0 : One edge
1 : Both edges
0 : One edge
1 : Both edges
0 : One edge
1 : Both edges
0 : One edge
1 : Both edges
_______
detect, stop condition detect, fault
error detect
detect, stop condition detect, fault
error detect
detect, stop condition detect, fault
error detect
detect, stop condition detect, fault
error detect
Function
After Reset
00
16
_______
RW
RW
RW
RW
RW
RW
RW
RW
RW
10. Interrupts