Table 556. Rx Fifo 1 Acknowledge Register Field Descriptions - STMicroelectronics SPC572L series Reference Manual

RM0400
Table 555. Rx FIFO 1 Status register field descriptions(Continued)
Field
Rx FIFO 1 Message Lost
6
This bit is a copy of interrupt flag IR[RF1L]. When IR[RF1L] is reset, this bit is also reset.
RF1L
0 No Rx FIFO 1 message lost
1 Rx FIFO 1 message lost, also set after write attempt to Rx FIFO 1 of size zero
Rx FIFO 1 Full
7
0 Rx FIFO 1 not full
F1F
1 Rx FIFO 1 full
8:9 Reserved
10:15 Rx FIFO 1 Put Index
F1P1 Rx FIFO 1 write index pointer, range 0 to 63.
16:17 Reserved
18:23 Rx FIFO 1 Get Index
F1G1 Rx FIFO 1 read index pointer, range 0 to 63.
24 Reserved
25:31 Rx FIFO 1 Fill Level
F1FL Number of elements stored in Rx FIFO 1, range 0 to 64.
44.3.5.2.31 Rx FIFO 1 Acknowledge Register (RXF1A)
Address: 0x00B8
0 1 2
R 0 0 0
W
Reset 0 0 0
16 17 18
R 0 0 0
W
Reset 0 0 0

Table 556. Rx FIFO 1 Acknowledge register field descriptions

Field
0:25 Reserved
Rx FIFO 1 Acknowledge Index
26:31
After the Host has read a message or a sequence of messages from Rx FIFO 1 it has to write the
F1AI buffer index of the last element read from Rx FIFO 1 to F1AI. This will set the Rx FIFO 1 Get Index
RXF1S[F1GI] to F1AI + 1 and update the FIFO 1 Fill Level RXF1S[F1FL].
3 4 5 6
0 0 0 0
0 0 0 0
19 20 21 22
0 0 0 0
0 0 0 0
Figure 501. Rx FIFO 1 Acknowledge register
DocID027809 Rev 4
Description
7 8 9 10
0 0 0 0
0 0 0 0
23 24 25 26
0 0 0
0 0 0 0
Description
CAN Subsystem
Access: RW
11 12 13 14
0 0 0 0
0 0 0 0
27 28 29 30
F1AI
0 0 0 0
1037/2058
15
0
0
31
0
1091