mc9s12ne64 Freescale Semiconductor, Inc, mc9s12ne64 Datasheet - Page 371

• Manufacturer Part Number: mc9s12ne64
• Description: Hcs12 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Figure 12-20
transmission of fast link pulses to establish communications with partners that are auto-negotiation able.
The receive block determines the capabilities of the link partner and writes to the link partner ability
register (register 5). The arbitration block determines the highest common mode of operation to establish
the link.
12.4.3
The 10BASE-T interface implements the physical layer specification for a 10 Mbps over two pairs of
twisted-pair cables. The specifications are given in clause 14 of the IEEE 802.3 standard.
In 10BASE-T mode, Manchester encoding is used. When transmitting, nibbles from the MII are converted
to a serial bit stream and then Manchester encoded. When receiving, the Manchester encoded bit stream
is decoded and converted to nibbles for presentation to the MII.
Freescale Semiconductor
MR_AUTONEG_ENABLE
MR_MAIN_RESET
POWER_ON
10BASE-T
CLK
shows the main blocks used in the auto-negotiation function. The transmit block allows
MR_ADV_ABILITY[15:0]
TD_AUTONEG
TRANSMIT
MR_ADV_ABILITY[3:0]
transmit_disable
transmit_ability
complete_ack
flp_link_good
transmit_ack
ack_finished
Figure 12-20. Auto-Negotiation
MC9S12NE64 Data Sheet, Rev. 1.1
TX_LINK_CONTROL[1:0]
MR_AUTONEG_COMPLETE
TX_LINK_STATUS[1:0]
MR_PARALLEL_DETECTION_FAULT
ARBITRATION
NLP RECEIVE LINK
LINK_TEST_RECEIVE
INTEGRITY TEST
1
2
DO
MR_LP_ADV_ABILITY[3:0]
RD
flp_receive_idle
match_wo_ack
1
2 LP_LINK_STATUS[1:0]
match_w_ack
receive_done
flp_link_good
LP_LINK_CONTROL[1:0]
MR_LP_ADV_ABILITY[15:0]
Functional Description
LINKPULSE
RECEIVE
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