HD6417618A datasheet(274/646 Pages) RENESAS

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Section 11 Ethernet Controller (EtherC)

Rev. 6.00 Jun. 12, 2007 Page 242 of 610

REJ09B0131-0600

11.3.10

Delayed Collision Detect Counter Register (CDCR)

CDCR is a 32-bit counter that indicates the number of delayed collisions on all lines from a start

of transmission. When the value in this register reaches H'FFFFFFFF, count-up is halted. The

counter value is cleared to 0 by a write to this register with any value.

Bit

Bit Name

Initial

Value

R/W

Description

31 to 0 COSDC31 to

COSDC0

All 0

R/W

Delayed Collision Detect Count

These bits indicate the number of delayed collisions

on all lines from a start of transmission.

11.3.11

Lost Carrier Counter Register (LCCR)

LCCR is a 32-bit counter that indicates the number of times the carrier was lost during data

transmission. When the value in this register reaches H'FFFFFFFF, the count is halted. The

counter value is cleared to 0 by writing to this register with any value.

Bit

Bit Name

Initial

Value

R/W

Description

31 to 0 LCC31 to

LCC0

All 0

R/W

Lost Carrier Count

These bits indicate the number of times the carrier

was lost during data transmission.

11.3.12

Carrier Not Detect Counter Register (CNDCR)

CNDCR is a 32-bit counter that indicates the number of times the carrier could not be detected

while the preamble was being sent. When the value in this register reaches H'FFFFFFFF, the count

is halted. The counter value is cleared to 0 by a write to this register with any value.

Bit

Bit Name

Initial

Value

R/W

Description

31 to 0 CNDC31 to

CNDC0

All 0

R/W

Carrier Not Detect Count

These bits indicate the number of times the carrier

was not detected.

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