msm9225 Oki Semiconductor, msm9225 Datasheet - Page 14

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

¡ Semiconductor
2. CAN interrupt register (CANI: 0Fhex)
(4) CAN write flag: CANA
(5) Transmission flag: TxF
(6) Receive flag: RxF
(1) Transmission interrupt output enable: EINTT
(2) Receive interrupt output enable: EINTR
This register controls CAN interrupts.
The bit configuration is as follows:
0Fh
Address MSB
"1" while CAN is writing receive data to the message memory.
When TxF is "1", CAN is in transmission operation status. TxF becomes "0" when
transmission completes.
This bit is used to output transmission interrupt signal INTT from interrupt pin INT
when transmission completes.
When EINTT is "0", a transmission interrupt signal is not output from the interrupt pin.
When EINTT is "1", a transmission interrupt signal is output from the interrupt pin.
At reset, EINTT is set to "0".
reception completes.
This bit is used to indicate receive data write status to the message memory. CANA is
This is a read-only flag.
This bit is used to indicate transmission operation status.
When TxF is "0", CAN is in transmission operation stop status.
This is a read-only flag.
This bit is used to indicate receive operation status.
When RxF is "0", CAN is in receive operation stop status.
When RxF is "1", CAN is in receive operation status. RxF becomes "0" when receiving
completes.
This is a read-only flag.
This bit is used to output receive interrupt signal INTR from interrupt pin INT when
When EINTR is "0", a receive interrupt signal is not output from the interrupt pin.
When EINTR is "1", a receive interrupt signal is output from the interrupt pin.
At reset, EINTR is set to "0".
7
6
5
4
3
2
1
LSB
0
EINTT : Transmission interrupt output enable
EINTR : Receive interrupt output enable
EINTE : Error interrupt output enable
Not used
ITF
IRF
IEF
MEINT : Master interrupt control enable
: Receive interrupt request flag
: Transmission interrupt request flag
: Error interrupt request flag
MSM9225
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