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EFE configuration
190
NS7520 Hardware Reference, Rev. D 03/2006
D02 R/W TBACK 0 Test backpressure
Set this bit to 1 to have the MAC assert
backpressure on the link; this allows preamble to
be transmitted raising carrier sense.
A transmit packet from the system is sent during
backpressure.
D01 R/W TPAUSE 0 Test pause
Set this bit to 1 to allow the MAC Control sublayer
to inhibit transmissions, similar to receipt of a
PAUSE receive control frame with a non-zero
pause time parameter.
D00 R/W SPQ 0 Shortcut pause quanta
Set this bit to 1 to reduce the effective PAUSE
quanta from 64 byte-times to 1 byte-time.
Bits Access Mnemonic Reset Description
Table 68: Test register bit definition