Sundance Spas manual ST201 Loopback Modes

Sundance Technology

BIT BIT NAME

30Paused

31Reserved

ST201 PRELIMINARY draft 2

BIT DESCRIPTION

This read-only status bit is set by ST201 to indicate that a PAUSE MAC Control frame had been received and halted the transmit MAC for the duration of the pause_time. It is cleared when the MAC can resume transmission.

Reserved for future use. Should be set to 0.

The loopback modes available to a host system when using the ST201 are shown in Table 3.

Loopback Mode

FIFO Loopback

MAC Loopback

External Loopback (MII) or True “On-wire”External

FIFOLoopback

1

0

0

MACLoopback

0

1

0

FullDuplexEnable

x

x

1

TABLE 3: ST201 Loopback Modes

External loopback type is controlled by the Mll PHY device. The host system must enable a loopback mode within MII PHY device using the MII Management Interface. For the true “on-the-wire”loopback mode, use a loopback plug (connector), clear all of the loopback bits, set the FullDuplexEnable bit in the MACCtrl reg- ister, and enable the full duplex mode within the MII PHY device.

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