Rscan0Txqstsm - Transmit Queue Status Register (M = 0 Or 1) - Renesas RZ/A Series User Manual

RZ/A1L Group, RZ/A1LU Group, RZ/A1LC Group
21.3.55 RSCAN0TXQSTSm — Transmit Queue Status Register (m = 0 or 1)
Access: Can be read/written in 8-, 16-, and 32-bit units
Address: <RSCAN0_base> + 03C0
Initial value: 0000 0001
H
Bit 31 30 29
— — —
Initial value 0 0 0
R/W R R R
Bit 15 14 13
— — —
0 0 0
Initial value
R/W R R R
Note 1.
Table 21.74
Bit Position
31 to 3
2
1
0
TXQIF Flag
The TXQIF flag is set to 1 when the event specified by the TXQIM bit in the RSCAN0TXQCCm
register has occurred.
The TXQIF flag is cleared to 0 in channel reset mode or by writing 0 to this flag. This flag is not
cleared to 0 by setting the TXQE bit in the RSCAN0TXQCCm register to 0 (the transmit queue is not
used).
TXQFLL Flag
The TXQFLL flag is set to 1 when the number of messages set for the transmit queue matches the
transmit queue depth set by the TXQDC[3:0] bits in the RSCAN0TXQCCm register.
This flag is cleared to 0 in any of the following cases.
• The number of messages set for the transmit queue is smaller than the transmit queue depth set by
the TXQDC[3:0] bits.
• In channel reset mode
R01UH0437EJ0600 Rev.6.00
Jan 29, 2021
+ (m * 0004 )
H H
28 27 26 25
— — — —
0 0 0 0
R R R R
12 11 10 9
— — — —
0 0 0 0
R R R R
The only effective value for writing to this flag bit is 0, which clears the bit. Otherwise writing to the bit results
in retention of its state.
RSCAN0TXQSTSm register contents
Bit Name Function
Reserved The read value is undefined. The write value should always be 0.
TXQIF Transmit Queue Interrupt Request Flag
0: No transmit queue interrupt request is present.
1: A transmit queue interrupt request is present.
TXQFLL Transmit Queue Full Status Flag
0: The transmit queue is not full.
1: The transmit queue is full.
TXQEMP Transmit Queue Empty Status Flag
0: The transmit queue contains messages.
1: The transmit queue contains no message (transmit queue empty).
24 23 22 21
— — — —
0 0 0 0
R R R R
8 7 6 5
— — — —
0 0 0 0
R R R R
21. CAN Interface
20 19 18 17
— — — —
0 0 0 0
R R R R
4 3 2 1
— — TXQIF TXQFLL
0 0 0 0
1
R R R/W* R
16
—
0
R
0
TXQEM
P
1
R
21-102