msm9225 Oki Semiconductor, msm9225 Datasheet - Page 15

• Manufacturer Part Number: msm9225
• Description: Can Controller Area Network Controller
• Manufacturer: Oki Semiconductor

INT pin
¡ Semiconductor
(3) Error interrupt output enable: EINTE
(4) Transmission interrupt request flag: ITF
(5) Receive interrupt request flag: IRF
(6) Error interrupt request flag: IEF
(7) Master interrupt control enable: MEINT
When an error occurs, this bit is used to output error interrupt signal INTE from interrupt
pin INT.
When EINTE is "0", an error interrupt signal is not output from the interrupt pin.
When EINTE is "1", an error interrupt signal is output from the interrupt pin.
At reset, EINTE is set to "0".
ITF becomes "1" when a transmission interrupt is generated. Only "0" can be written to
this bit.
At reset, ITF is set to "0".
IRF becomes "1" when a receive interrupt is generated. Only "0" can be written to this bit.
At reset, IRF is set to "0".
IEF becomes "1" when an error occurs. Only "0" can be written to this bit.
At reset, IEF is set to "0".
This bit is used to set enable/disable of communication interrupts.
The flowchart of interrupt control is shown below.
When MEINT is "0", interrupt request control is disabled.
When MEINT is "1", interrupt request control is enabled.
At reset, MEINT is set to "0".
1
0
MEINT
1
1
1
0
0
0
EINTR
EINTT
EINTE
IEF
Interrupt factor (An error occurs)
ITF
EIT (each message)
IRF
EIR (each message)
Interrupt factor
(transmission completion)
Interrupt factor
(reception completion)
MSM9225
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