Output (MDIO) Module User's Guide

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Ethernet Media Access Controller (EMAC) Registers

Table 69. MAC Status Register (MACSTATUS) Field Descriptions (continued)

Bit Field Value Description

10-8 RXERRCH 0-3h Receive host error channel. These bits indicate which receive channel the host error occurred on.

This field is cleared to 0 on a host read.

0 The host error occurred on receive channel 0

1h The host error occurred on receive channel 1

2h The host error occurred on receive channel 2

3h The host error occurred on receive channel 3

4h The host error occurred on receive channel 4

5h The host error occurred on receive channel 5

6h The host error occurred on receive channel 6

7h The host error occurred on receive channel 7

7-3 Reserved 0 Reserved

2 RXQOSACT Receive Quality of Service (QOS) active bit. When asserted, indicates that receive quality of service

is enabled and that at least one channel freebuffer count (RX nFREEBUFFER) is less than or equal

to the RXFILTERLOWTHRESH value.

0 Receive quality of service is disabled.

1 Receive quality of service is enabled.

1 RXFLOWACT Receive flow control active bit. When asserted, at least one channel freebuffer count

(RX nFREEBUFFER) is less than or equal to the channel's corresponding RX nFILTERTHRESH

value.

0 Receive flow control is inactive.

1 Receive flow control is active.

0 TXFLOWACT Transmit flow control active bit. When asserted, this bit indicates that the pause time period is being

observed for a received pause frame. No new transmissions will begin while this bit is asserted,

except for the transmission of pause frames. Any transmission in progress when this bit is asserted

will complete.

0 Transmit flow control is inactive.

1 Transmit flow control is active.

SPRUEQ6 – December 2007 Ethernet Media Access Controller (EMAC)/Management Data Input/Output (MDIO) 113

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