Sundance-spas ST201 Manual do Utilizador descarregar pdf (Página 52)

Sundance Technology ST201 PRELIMINARY draft 2

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

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.

30 Paused 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.

31 Reserved Reserved for future use. Should be set to 0.

Loopback Mode FIFOLoopback MACLoopback FullDuplexEnable

FIFO Loopback 1 0 x

MAC Loopback 0 1 x

External Loopback (MII) or

True “On-wire” External

0 0 1

TABLE 3: ST201 Loopback Modes

BIT BIT NAME BIT DESCRIPTION

1 2 ... 47 48 49 50 51 52 53 54 55 56 57 ... 144 145

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