r5f71374an80fpv Renesas Electronics Corporation., r5f71374an80fpv Datasheet - Page 788
r5f71374an80fpv
Manufacturer Part Number
r5f71374an80fpv
Description
32-bit Risc Microcomputer Superh?? Risc Engine Family
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.R5F71374AN80FPV.pdf
(1154 pages)
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Section 19 Controller Area Network (RCAN-ET)
(4)
The ABACK0 is a 16-bit read / conditionally-write registers. This register is used to signal to the
CPU that a mailbox transmission has been aborted as per its request. When an abort has succeeded
the RCAN-ET sets the corresponding bit in the ABACK register. The CPU may clear the Abort
Acknowledge bit by writing a '1' to the corresponding bit location. Writing a '0' has no effect. An
ABACK bit position is set by the RCAN-ET to acknowledge that a TXPR bit has been cleared by
the corresponding TXCR bit.
• ABACK0
Initial value:
Note : * Only when writing a ‘1’ to clear.
Bit 15 to 1 — notifies that the requested transmission cancellation of the corresponding Mailbox
has been performed successfully. The bit 15 to 1 corresponds to Mailbox-15 to 1 respectively.
Bit 0 — This bit is always ‘0’ as this is a receive-only mailbox. Writing a '1' to this bit position
has no effect and always read back as a ‘0’.
(5)
The RXPR0 is a 16-bit read / conditionally-write registers. The RXPR is a register that contains
the received Data Frames pending flags associated with the configured Receive Mailboxes. When
a CAN Data Frame is successfully stored in a receive mailbox the corresponding bit is set in the
RXPR. The bit may be cleared by writing a '1' to the corresponding bit position. Writing a '0' has
no effect. However, the bit may only be set if the mailbox is configured by its MBC (Mailbox
Configuration) to receive Data Frames. When a RXPR bit is set, it also sets IRR1 (Data Frame
Received Interrupt Flag) if its MBIMR (Mailbox Interrupt Mask Register) is not set, and the
interrupt signal is generated if IMR1 is not set. Please note that these bits are only set by receiving
Data Frames and not by receiving Remote frames.
Rev. 1.00 Sep. 21, 2007 Page 762 of 1124
REJ09B0402-0100
Bit[15:1]:ABACK0 Description
0
1
R/W:
Abort Acknowledge Register (ABACK0)
Data Frame Receive Pending Register (RXPR0)
Bit:
R/W* R/W* R/W* R/W* R/W* R/W* R/W* R/W* R/W* R/W* R/W* R/W* R/W* R/W* R/W*
15
0
14
0
13
[Clearing Condition] Writing ‘1’ (Initial value)
Corresponding Mailbox has cancelled transmission of message (Data or
Remote Frame)
[Setting Condition] Completion of transmission cancellation for corresponding
mailbox
0
12
0
11
0
10
0
9
0
ABACK0[15:1]
8
0
7
0
6
0
5
0
4
0
3
0
2
0
1
0
0
0
0
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