Transmit Control Register (Tcr) - STMicroelectronics SPC572L series Reference Manual

Fast Ethernet Controller (FEC)
Field
RMII Mode. Indicates if the FEC is in RMII or MII/7-wire mode. See the chip configuration chapter
for more details.
0 FEC is in true MII mode.
RMII_MODE
1 FEC is in RMII mode.
Note: Interface selection is chip-specific; see the chapter that describes how modules are
configured and connected.
Flow control enable. If asserted, the receiver detects PAUSE frames. Upon PAUSE frame
FCE
detection, the transmitter stops transmitting data frames for a given duration.
Broadcast frame reject. If asserted, frames with DA (destination address) equal to
BC_REJ FFFF_FFFF_FFFF are rejected unless the PROM bit is set. If BC_REJ and PROM are set, frames
with broadcast DA are accepted and the M (MISS) is set in the receive buffer descriptor.
PROM Promiscuous mode. All frames are accepted regardless of address matching.
Media independent interface mode. Selects the external interface mode for transmit and receive
blocks.
07-wire mode (used only for serial 10 Mbps)
MII_MODE
1MII or RMII mode as indicated by the RMII_MODE bit
Note: Interface selection is chip-specific; see the chapter that describes how modules are
configured and connected.
Disable receive on transmit.
0 Receive path operates independently of transmit (use for full duplex or to monitor transmit activity
DRT
in half duplex mode).
1 Disable reception of frames while transmitting (normally used for half duplex mode).
Internal loopback. If set, transmitted frames are looped back internal to the device and transmit
LOOP output signals are not asserted. The internal bus clock substitutes for the FEC_TXCLK when LOOP
is asserted. DRT must be set to 0 when setting LOOP.
48.4.10

Transmit Control Register (TCR)

The TCR configures the transmit block.
Offset: 0C4h
0 1 2 3
R 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
W
Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
1312/2058
Table 708. RCR field descriptions(Continued)
4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Figure 699. Transmit Control Register (TCR)
DocID027809 Rev 4
Description
RM0400
Access: User read/write