HD6417616 RENESAS [Renesas Technology Corp], HD6417616 Datasheet - Page 418

• Manufacturer Part Number: HD6417616
• Description: 32-Bit RISC Microcomputer SuperH™ RISC engine Family/SH7600 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 9 Ethernet Controller (EtherC)
9.2.11
CDCR is a 16-bit counter that indicates the number of collisions that occurred on the line,
counting from a point 512 bits after the start of data transmission. When the value in this register
reaches H'FFFF (65,535), the count is halted. The counter value is cleared to 0 by a write to this
register (the write value is immaterial).
Bits 31 to 16—Reserved: These bits are always read as 0. The write value should always be 0.
Bits 15 to 0—Collision Detect Count 15 to 0 (COLDC15 to COLDC0): These bits indicate the
count of collisions from a point 512 bits after the start of data transmission.
Rev. 2.00 Mar 09, 2006 page 392 of 906
REJ09B0292-0200
Initial value:
Initial value:
Initial value:
R/W:
R/W:
R/W:
Bit:
Bit:
Bit:
Delay Collision Detect Counter Register (CDCR)
COLDC1
COLDC7 COLDC6 COLDC5 COLDC4 COLDC3 COLDC2 COLDC1 COLDC0
R/W
R/W
31
15
—
R
5
0
0
7
0
COLDC1
R/W
R/W
30
14
—
R
4
0
0
6
0
COLDC1
R/W
R/W
29
13
—
R
3
0
0
5
0
COLDC1
R/W
R/W
. . .
. . .
. . .
. . .
12
2
0
4
0
COLDC1
R/W
R/W
19
11
—
R
1
0
0
3
0
COLDC1
R/W
R/W
18
10
—
R
0
0
0
2
0
COLDC9 COLDC8
R/W
R/W
17
—
R
0
9
0
1
0
R/W
R/W
16
—
R
0
8
0
0
0