Texas Instruments TMS320DM643X DMP Rxpasscrc Rxqosen Rxnochain, Rxcmfen, Rxcsfen Rxcefen Rxcafen

www.ti.com

Ethernet Media Access Controller (EMAC) Registers

5.20 Receive Multicast/Broadcast/Promiscuous Channel Enable Register (RXMBPENABLE)

The receive multicast/broadcast/promiscuous channel enable register (RXMBPENABLE) is shown in Figure 46 and described in Table 45.

Figure 46. Receive Multicast/Broadcast/Promiscuous Channel Enable Register (RXMBPENABLE)

31	30	29	28	27		25	24
Reserved	RXPASSCRC	RXQOSEN	RXNOCHAIN		Reserved		RXCMFEN
R-0	R/W-0	R/W-0	R/W-0		R-0		R/W-0
23	22	21	20	19	18		16
RXCSFEN	RXCEFEN	RXCAFEN	Reserved			RXPROMCH
R/W-0	R/W-0	R/W-0	R-0			R/W-0
15	14	13	12	11	10		8
Reserved		RXBROADEN	Reserved			RXBROADCH
	R-0	R/W-0	R-0			R/W-0
7	6	5	4	3	2		0
Reserved		RXMULTEN	Reserved			RXMULTCH
	R-0	R/W-0	R-0			R/W-0

LEGEND: R = Read only; R/W = Read/Write; -n= value after reset

Table 45. Receive Multicast/Broadcast/Promiscuous Channel Enable Register (RXMBPENABLE)

Field Descriptions

Bit	Field	Value	Description
31	Reserved	0	Reserved
30	RXPASSCRC		Pass receive CRC enable bit
		0	Received CRC is discarded for all channels and is not included in the buffer descriptor packet
			length field.
		1	Received CRC is transferred to memory for all channels and is included in the buffer descriptor
			packet length.
29	RXQOSEN		Receive quality of service enable bit
		0	Receive QOS is disabled.
		1	Receive QOS is enabled.
28	RXNOCHAIN		Receive no buffer chaining bit
		0	Received frames can span multiple buffers.
		1	The Receive DMA controller transfers each frame into a single buffer, regardless of the frame or
			buffer size. All remaining frame data after the first buffer is discarded. The buffer descriptor buffer
			length field will contain the entire frame byte count (up to 65535 bytes).
27-25	Reserved	0	Reserved
24	RXCMFEN		Receive copy MAC control frames enable bit. Enables MAC control frames to be transferred to
			memory. MAC control frames are normally acted upon (if enabled), but not copied to memory. MAC
			control frames that are pause frames will be acted upon if enabled in MACCONTROL, regardless of
			the value of RXCMFEN. Frames transferred to memory due to RXCMFEN will have the CONTROL
			bit set in their EOP buffer descriptor.
		0	MAC control frames are filtered (but acted upon if enabled).
		1	MAC control frames are transferred to memory.
23	RXCSFEN		Receive copy short frames enable bit. Enables frames or fragments shorter than 64 bytes to be
			copied to memory. Frames transferred to memory due to RXCSFEN will have the FRAGMENT or
			UNDERSIZE bit set in their EOP buffer descriptor. Fragments are short frames that contain CRC /
			align / code errors and undersized are short frames without errors.
		0	Short frames are filtered.
		1	Short frames are transferred to memory.

86 Ethernet Media Access Controller (EMAC)/SPRU941A –April 2007

Management Data Input/Output (MDIO) Submit Documentation Feedback