r5s77631ay266bgv Renesas Electronics Corporation., r5s77631ay266bgv Datasheet - Page 890
r5s77631ay266bgv
Manufacturer Part Number
r5s77631ay266bgv
Description
Renesas 32-bit Risc Microcomputer Superhtm Risc Engine Family Sh-4a Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.R5S77631AY266BGV.pdf
(2026 pages)
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Section 23 Gigabit Ethernet Controller (GETHER)
23.3.12 Delayed Collision Detect Counter Register (CDCR)
CDCR is a 16-bit counter that indicates the number of all delayed collisions that occurred on the
line after the start of data transmission. When the value in this register reaches H'0000FFFF,
count-up is halted. This register is cleared to 0 when it is read with the TRCCM bit in ECMR set
to 1. When the TRCCM bit in ECMR is 0, this register is cleared to 0 by writing H'11111111.
Rev. 1.00 Oct. 01, 2007 Page 824 of 1956
REJ09B0256-0100
Bit
31 to 16
15 to 0
Initial value:
Initial value:
R/W:
R/W:
Bit:
Bit:
Bit Name
COSDC[15:0] All 0
R/W
31
15
R
0
0
R/W
30
14
R
0
0
R/W
29
13
R
0
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.
Delayed Collision Detect Count
These bits indicate the number of all delayed collisions
after the start of data transmission.
R/W
25
R
0
9
0
COSDC[15:0]
R/W
24
R
0
8
0
R/W
23
R
0
7
0
R/W
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
R/W
18
R
0
2
0
17
R
0
1
0
R/W
16
R
0
0
0
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