msm9225 Oki Semiconductor, msm9225 Datasheet - Page 51

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

If the receive node detects an error between the start-of-frame and the CRC field, Ack slot =
"recessive" is output. If an error is not detected, Ack slot = "dominant" is output.
The transmit node outputs 2 "recessive" bits, and verifies the reception status of the receive node.
• Error active: The interframe space consists of a 3- or 2-bit intermission and bus idle.
• Error passive: The interframe space consists of intermission, suspend transmission, and bus
¡ Semiconductor
R
D
idle.
(Each frame)
(f) Ack field
The field verifies correct reception.
The Ack field consists of a 1-bit Ack slot and a 1-bit Ack delimiter.
(g) End-of-frame
This frame indicates the completion of transmission or reception.
The end-of-frame consists of 7 "recessive" bits.
(h) Interframe space
The interframe space is inserted between the data frame, remote frame, error frame, and
overload frame and the next frame. The interframe space indicates the separation between
frames.
Output is prohibited during intermission.
R
D
R
D
R
D
(Each frame)
(Ack field)
Intermission
(3/2 bits)
(CRC field)
Intermission
(3/2 bits)
ACK slot
Interframe space
Suspend transmission
(1 bit)
End-of-frame
Interframe space
(7 bits)
(8 bits)
Ack field
Ack delimiter
(0 to • bits)
Bus idle
(1 bit)
(0 to • bits)
(Interframe space or
overload frame)
(Ebd-of-frame)
Bus idle
(Each frame)
MSM9225
(Each frame)
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