TC1796
Peripheral Units (Vol. 2 of 2)
Controller Area Network (MultiCAN) Controller
User’s Manual 22-106 V2.0, 2007-07
MultiCAN, V2.0
The Message Object FIFO/Gateway Pointer Register MOFGPRn contains a set of
message object link pointers used for FIFO and gateway operations.
MOFGPRn (n = 0-127)
Message Object n FIFO/Gateway Pointer Register
(0604
H
+n*20
H
) Reset Value: 0000 0000
H
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
SEL CUR
rw rwh
1514131211109876543210
TOP BOT
rw rw
Field Bits Type Description
BOT [7:0] rw Bottom Pointer
Bit field BOT points to the first element in a FIFO
structure.
TOP [15:8] rw Top Pointer
Bit field TOP points to the last element in a FIFO
structure.
CUR [23:16] rwh Current Object Pointer
Bit field CUR points to the actual target object within
a FIFO/Gateway structure.
After a FIFO/gateway operation CUR is updated with
the message number of the next message object in
the list structure (given by PNEXT of the message
control register) until it reaches the FIFO top element
(given by TOP) when it is reset to the bottom element
(given by BOT).
SEL [31:24] rw Object Select Pointer
Bit field SEL is the second (software) pointer to
complement the hardware pointer CUR in the FIFO
structure. SEL is used for monitoring purposes (FIFO
interrupt generation).
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