Maxim DS33Z41 specifications MAC Registers, Su.Maccr

DS33Z41 Quad IMUX Ethernet Mapper

9.6.2MAC Registers

The control registers related to the control of the individual MACs are shown in the following tables. The DS33Z41 keeps statistics for the packet traffic sent and received. The register address map is shown in the following Table. Note that the addresses listed are the indirect addresses that must be provided to SU.MACRADH/SU.MACRADL or SU.MACAWH/SU.MACAWL.

Register Name:		SU.MACCR
Register Description:		MAC Control Register
Register Address:		0000h (indirect)
0000h:
Bit #	31	30	29	28	27	26	25	24
Name	Reserved	Reserved	Reserved	HDB	PS	Reserved	Reserved	Reserved
Default	0	0	0	0	0	0	0	0
0001h:
Bit #	23	22	21	20	19	18	17	16
Name	DRO	Reserved	OML0	F	PM	PAM	Reserved	Reserved
Default	0	0	0	0	0	0	0	0
0002h:
Bit #	15	14	13	12	11	10	09	08
Name	Reserved	Reserved	Reserved	LCC	Reserved	DRTY	Reserved	ASTP
Default	0	0	0	0	0	0	0	0
0003h:
Bit #	07	06	05	04	03	02	01	00
Name	BOLMT1	BOLMT0	DC	Reserved	TE	RE	Reserved	Reserved
Default	0	0	0	0	0	0	0	0

Bit 28: Heartbeat Disable (HDB). When set to 1, the heartbeat (SQE) function is disabled. This bit should be set to 1 when operating in MII mode.

Bit 27: Port Select (PS). This bit should be equal to 0 for proper operation.

Bit 23: Disable Receive Own (DRO). When set to 1, the MAC disables the reception of frames while TX_EN is asserted. When this bit equals zero, transmitted frames are also received by the MAC. This bit should be cleared when operating in full-duplex mode. This bit must be set to 1 for half-duplex operation.

Bit 21: Loopback Operating Mode (OMLO). When set to 1, data is looped from the transmit side, back to the receive side, without being transmitted to the PHY.

Bit 20: Full-Duplex Mode Select (F). When set to 1, the MAC transmits and receives data simultaneously. When in full-duplex mode, the heartbeat check is disabled and the heartbeat fail status should be ignored.

Bit 19: Promiscuous Mode (PM). When set to 1, the MAC is in Promiscuous Mode and forwards all frames. Note that the default value is 1.

Bit 18: Pass All Multicast (PAM). When set to 1, the MAC forwards Multicast Frames.

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