Circuit Board Reference Manual

Memory Map/Register Definition
MCF548x Reference Manual, Rev. 3
Freescale Semiconductor 30-19
30.3.3.9 Transmit Control Register (TCR)
The TCR is read/write and is written by the user to configure the transmit block. This register is cleared at
system reset. Bits 2 and 1 should be modified only when ECR[ETHER_EN] is cleared.
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
RFCEMULT
CAST
HASH 00000000
W
Reset Uninitialized 00000000
1514131211109876543210
R0000000000000000
W
Reset0000000000000000
Reg
Addr
MBAR + 0x9088 (FEC0), 0x9888 (FEC1)
Figure 30-9. Receive Hash Register (RHR)
Table 30-15. RHR Bits Description
Bits Name Description
31 FCE This is a read only view of the flow control enable (FCE) bit in the RCR.
30 MULTCAST Set if the current receive frame contained a multi-cast destination address (the least
significant bit of the DA was set). Cleared if the current receive frame does not correspond
to a multi-cast address.
29–24 HASH Corresponds to the “hash” value of the current receive frame’s destination address.
23–0 — Reserved, should be cleared.
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
R00000000000 00000
W
Reset00000000000 00000
1514131211109876543210
R00000000000RFC_
PAUS E
TFC_
PAUS E
FDEN HBC GTS
W
Reset00000000000 00000
Reg
Addr
MBAR + 0x90C4 (FEC0), 0x98C4 (FEC1)
Figure 30-10. Transmit Control Register (TCR)