R01UH0823EJ0100 Rev.1.00
Page 1224 of 1823
Jul 31, 2019
RX23W Group
36. CAN Module (RSCAN)
36.2.34
Receive FIFO Control Register m (RFCCm) (m = 0, 1)
RFE Bit (Receive FIFO Buffer Enable)
Setting the RFE bit to 1 makes receive FIFO buffers available. Setting this bit to 0 sets the RFSTSm.RFEMP flag to 1
(the receive FIFO buffer contains no unread message (buffer empty)). Modify this bit only in global operating mode or
global test mode.
RFIE Bit (Receive FIFO Interrupt Enable)
Setting the RFIE bit to 1 enables receive FIFO interrupts. Modify this bit when the RFE bit is set to 0 (no receive FIFO
buffer is used).
RFDC[2:0] Bits (Receive FIFO Buffer Depth Configuration)
These bits are used to select the number of messages that can be stored in a single receive FIFO buffer. If these bits are
set to 000b, do not use any receive FIFO buffer. Modify these bits only in global reset mode.
RFIM Bit (Receive FIFO Interrupt Source Select)
This bit is used to select a FIFO interrupt source. Modify this bit only in global reset mode.
Address(es): RSCAN.RFCC0 000A 8338h, RSCAN.RFCC1 000A 833Ah
b15
b14
b13
b12
b11
b10
b9
b8
b7
b6
b5
b4
b3
b2
b1
b0
RFIGCV[2:0]
RFIM
—
RFDC[2:0]
—
—
—
—
—
—
RFIE
RFE
Value after reset:
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Bit
Symbol
Bit Name
Description
R/W
b0
Receive FIFO Buffer Enable
0: No receive FIFO buffer is used.
1: Receive FIFO buffers are used.
R/W
b1
Receive FIFO Interrupt Enable
0: Receive FIFO interrupt is disabled.
1: Receive FIFO interrupt is enabled.
R/W
b7 to b2
—
Reserved
These bits are read as 0. The write value should be 0.
R/W
b10 to b8
Receive FIFO Buffer Depth
Configuration
b10
b8
0 0 0: 0 messages
0 0 1: 4 messages
0 1 0: 8 messages
0 1 1: 16 messages
1 0 0: Setting prohibited
1 0 1: Setting prohibited
1 1 0: Setting prohibited
1 1 1: Setting prohibited
R/W
b11
—
Reserved
This bit is read as 0. The write value should be 0.
R/W
b12
Receive FIFO Interrupt Source
Select
0: An interrupt occurs when the condition set by the
RFIGCV[2:0] bits is met.
1: An interrupt occurs each time a message has been
received.
R/W
b15 to b13
Receive FIFO Interrupt Request
Timing Select
b15
b13
0 0 0: When FIFO is 1/8 full.
0 0 1: When FIFO is 2/8 full.
0 1 0: When FIFO is 3/8 full.
0 1 1: When FIFO is 4/8 full.
1 0 0: When FIFO is 5/8 full.
1 0 1: When FIFO is 6/8 full.
1 1 0: When FIFO is 7/8 full.
1 1 1: When FIFO is full.
R/W