MSM9225GS-2K Просмотр технического описания (PDF) - Oki Electric Industry

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MSM9225GS-2K

CAN (Controller Area Network) Controller

Oki Electric Industry 

¡ Semiconductor

MSM9225

(3) Error interrupt output enable: EINTE

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".

(4) Transmission interrupt request flag: ITF

ITF becomes "1" when a transmission interrupt is generated. Only "0" can be written to

this bit.

At reset, ITF is set to "0".

(5) Receive interrupt request flag: IRF

IRF becomes "1" when a receive interrupt is generated. Only "0" can be written to this bit.

At reset, IRF is set to "0".

(6) Error interrupt request flag: IEF

IEF becomes "1" when an error occurs. Only "0" can be written to this bit.

At reset, IEF is set to "0".

(7) Master interrupt control enable: MEINT

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".

INT pin

MEINT

0

1

EINTT

0

1

EINTR

0

1

EINTE

0

1

ITF

Interrupt factor

(transmission completion)

EIT (each message)

IRF

Interrupt factor

(reception completion)

EIR (each message)

IEF

Interrupt factor (An error occurs)

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