C167CS Datasheet, PDF (402/517 Pages) Infineon Technologies AG – 16-Bit Single-Chip Microcontroller

C167CS
Derivatives
The On-Chip CAN Interface
CPU releases Buffer 2
Reset
CPU releases Buffer 1
Buffer 1 = Released
Buffer 2 = Released
CPU access to Buffer 2
CPU allocates Buffer 2
Store received
message into Buffer 1
Buffer 1 = Released
Buffer 2 = Allocated
CPU access to Buffer 2
Buffer 1 = Allocated
Buffer 2 = Released
CPU access to Buffer 1
Store received
message
into Buffer 1
Store received
message
into Buffer 2
Buffer 1 = Allocated
Buffer 2 = Allocated
CPU access to Buffer 2
Buffer 1 = Allocated
Buffer 2 = Allocated
CPU access to Buffer 1
Store received
message into
Buffer 1
MSGLST is set
CPU releases CPU releases
Buffer 2
Buffer 1
Allocated: NEWDAT = 1 or RMTPND = 1
Released: NEWDAT = 0 and RMTPND = 0
Store received
message into
Buffer 2
MSGLST is set
MCA04400
Figure 19-11 Handling of the Last Message Object’s Alternating Buffer
User’s Manual
19-30
V2.0, 2000-07