HD6417618 datasheet(266/646 Pages) RENESAS

266 / 646 page

Section 11 Ethernet Controller (EtherC)

Rev. 6.00 Jun. 12, 2007 Page 234 of 610

REJ09B0131-0600

Bit

Bit Name

Initial

Value

R/W

Description

R/W

Transmission Enable

If a frame is being transmitted when this bit is

switched from transmit function enabled (TE = 1) to

disabled (TE = 0), the transmit function will be enabled

until transmission of the corresponding frame is

completed.

0: Transmit function is disabled

1: Transmit function is enabled



Reserved

This bit is always read as 0. The write value should

always be 0.

ILB

R/W

Internal Loop Back Mode

Specifies loopback mode in the EtherC.

0: Normal data transmission/reception is performed.

1: When DM = 1, data loopback is performed inside

the MAC in the EtherC.

ELB

R/W

External Loop Back Mode

This bit value is output directly to this LSI’s general-

purpose external output pin (EXOUT). This bit is used

for loopback mode directives, etc., in the LSI, using

the EXOUT pin. In order for LSI loopback to be

implemented using this function, the LSI must have a

pin corresponding to the EXOUT pin.

0: Low-level output from the EXOUT pin

1: High-level output from the EXOUT pin

R/W

Duplex Mode

Specifies the EtherC transfer method.

0: Half-duplex transfer is specified

1: Full-duplex transfer is specified

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