r5s77631ay266bgv Renesas Electronics Corporation., r5s77631ay266bgv Datasheet - Page 989

• Manufacturer Part Number: r5s77631ay266bgv
• Description: Renesas 32-bit Risc Microcomputer Superhtm Risc Engine Family Sh-4a Series
• Manufacturer: Renesas Electronics Corporation.

23.3.77 Receive Missed-Frame Counter Register (RMFCR)
RMFCR is a 16-bit counter that indicates the number of frames that could not be saved in the
receive buffer and so were discarded during reception. When the receive FIFO overflows, the
receive frames in the FIFO are discarded. The number of frames discarded at this time is counted.
When the value in this register reaches H'FFFF, count-up is halted. Clear the counter by writing
H'0000 in this register.
Bit
31 to 16
15 to 0
Initial value:
Initial value:
R/W:
R/W:
Bit:
Bit:
Bit Name

MFC[15:0]
R/W
31
15

R
0
0
R/W
30
14

R
0
0
R/W
29
13

R
0
0
All 0
Initial
Value
All 0
R/W
28
12

R
0
0
R/W
27
11

R
0
0
R/W
R
R/W
R/W
26
10

R
0
0
Description
Reserved
These bits are always read as 0. The write value should
always be 0.
Missed-Frame Counter
These bits indicate the number of frames that are
discarded and not transferred to the receive buffer
during reception.
R/W
25

R
0
9
0
R/W
24
MCF[15:0]

R
0
8
0
Section 23 Gigabit Ethernet Controller (GETHER)
R/W
23

R
0
7
0
R/W
Rev. 1.00 Oct. 01, 2007 Page 923 of 1956
22

R
0
6
0
R/W
21

R
0
5
0
R/W
20

R
0
4
0
R/W
19

R
0
3
0
REJ09B0256-0100
R/W
18

R
0
2
0
17

R
0
1
0
R/W
16

R
0
0
0