SH7713 datasheet(682/904 Pages) RENESAS

682 / 904 page

Section 18 Ethernet Controller (EtherC)

Rev.1.50 Aug. 30, 2006 Page 642 of 860

REJ09B0288-0150

Bit

Bit Name

Initial

Value

R/W

Description

R/W

Reception Enable

If a switch is made from receive function enabled (RE

= 1) to disabled (RE = 0) while a frame is being

received, the receive function will be enabled until

reception of the corresponding frame is completed.

0: Receive function is disabled

1: Receive function is enabled

R/W

Transmission Enable

If a switch is made from transmit function enabled

(TE = 1) to disabled (TE = 0) while a frame is being

transmitted, 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: Data loopback is performed inside the MAC in the

EtherC at DM = 1.

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 PHY-

LSI, using the EXOUT pin. In order for PHY-LSI

loopback to be implemented using this function, the

PHY-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

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