78Q2132 TDK Corp., 78Q2132 Datasheet - Page 13

• Manufacturer Part Number: 78Q2132
• Description: 1/10base-t Homepna/ethernet Transceiver
• Manufacturer: TDK Corp.

MR0 - CONTROL REGISTER (continued)
MR1 - STATUS REGISTER
They do not reflect any ability changes made via the MII management interface to bit 0.8 (DUPLEX).
1.10:6
0.6:0
1.15
1.14
1.13
1.12
1.11
BIT
1.5
1.4
0.8
0.7
SYMBOL
DUPLEX
RFAULT
100X_H
RSVD
100X_F
ANEGC
COLT
10T_H
100T4
10T_F
RSVD
R, W, (0)
R, W, 0
TYPE
R, 0
R, (1)
R, (1)
R, 0
R, 0
R, 0
R, 0
R, 0
R, 0
DESCRIPTION
HPNAEN=0
2132 supports full duplex or half duplex. A logic one indicates full
duplex operation and a logic zero indicates half duplex. When auto-
negotiation is enabled, this bit will have no effect on the 2132. At
reset, this bit reflects the highest operating mode allowed by the
TECH pins. The MII can write to this bit, but the bit will change
value only if the new value is allowed by the TECH pins.
HPNAEN=1: not applicable
HPNAEN=0 COLLISION TEST: When this bit is set to one, the
78Q2132 will assert the COL signal in response to the assertion of
TX_EN signal. Collision test is enabled regardless of the duplex
mode of operation.
HPNAEN=1: not applicable
RESERVED
HPNAEN=0 :100BASE-T4 ABILITY: (0 = not able)
HPNAEN=1: not applicable
HPNAEN=0: 100BASE-TX FULL DUPLEX ABILITY: (0 = not able)
HPNAEN=1: not applicable
HPNAEN=0: 100BASE-TX HALF DUPLEX ABILITY: (0 = not able)
HPNAEN=1: not applicable
HPNAEN=0: 10BASE-T FULL DUPLEX ABILITY: (1 = able)
HPNAEN=1: not applicable
HPNAEN=0: 10BASE-T HALF DUPLEX ABILITY: (1= able)
HPNAEN=1: not applicable
RESERVED
HPNAEN=0: AUTO-NEGOTIATION COMPLETE: A logic one
indicates that the auto-negotiation process has completed, the
contents of MR4,5,and 6 are valid, and that the highest common
duplex mode has been found.
HPNAEN=1: not applicable
HPNAEN=0: REMOTE FAULT: A logic one indicates that a remote
fault condition has been detected. It remains set until it is cleared.
This bit can only be cleared by reading this register MR1 via the
management interface.
HPNAEN=1: not applicable
13
HomePNA/Ethernet Transceiver
DUPLEX MODE: This bit determines whether the
1/10BASE-TX
78Q2132