HD6432621 Hitachi, HD6432621 Datasheet - Page 580

• Manufacturer Part Number: HD6432621
• Description: (HD64F262x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

15.2.11 Interrupt Register (IRR)
The interrupt register (IRR) is a 16-bit readable/writable register containing status flags for the
various interrupt sources.
Bit 15—Overload Frame/Bus Off Recovery Interrupt Flag (IRR7): Status flag indicating that
the HCAN has transmitted an overload frame or recovered from the bus off state.
Bit 15: IRR7
0
1
Bit 14—Bus Off Interrupt Flag (IRR6): Status flag indicating the bus off state caused by the
transmit error counter.
Bit 14: IRR6
0
1
536
Initial value:
Initial value:
IRR
Note: * Can only be written with 1 for flag clearing.
R/W:
R/W:
Bit:
Bit:
R/(W)*
IRR7
Description
[Clearing condition]
Writing 1
Overload frame transmission or recovery from bus off state
[Setting conditions]
Error active/passive state
Bus off state
Description
[Clearing condition]
Writing 1
Bus off state caused by transmit error
[Setting condition]
When TEC
15
—
—
0
7
0
When overload frame is transmitted
When 11 recessive bits is received 128 times (REC 128)
R/(W) * R/(W) *
IRR6
14
—
—
0
6
0
256
IRR5
13
—
—
0
5
0
R/(W) * R/(W) *
R/(W) *
IRR12
IRR4
12
0
4
0
IRR3
11
—
—
0
3
0
IRR2
10
—
—
0
R
2
0
IRR1
IRR9
9
0
R
1
0
R
(Initial value)
(Initial value)
R/(W) *
R/(W) *
IRR0
IRR8
8
1
0
0