Intel IXF1104 5.7.2.2.2TX_FAULT_0:3, 5.7.2.2.3RX_LOS_0:3, 5.7.2.2.4TX_DISABLE_0:3, Datasheet

IXF1104 Quad-Port 10/100/1000 Mbps Ethernet Media Access Controller

The status of each bit (one for each port) is found in bits [3:0] of the “Optical Module Status Ports 0-3 ($0x799)” on page 221). Any change in the state of these bits causes a logic Low level on the MOD_DEF_INT output if this operation is enabled.

5.7.2.2.2TX_FAULT_0:3

TX_FAULT_0:3 are inputs to the IXF1104. These signals are pulled to a logic Low level by the optical module during normal operation. A logic Low level on these signals indicates no fault condition exists. If a fault is present, a logic High is received through the use of an external pull-up resistor at the IXF1104 pad.

The status of each bit (one for each port) can be found in bits [13:10] of the “Optical Module Status Ports 0-3 ($0x799)” on page 221. Any change in the state of these bits causes a logic Low level on the TX_FAULT_INT output if this operation is enabled.

5.7.2.2.3RX_LOS_0:3

RX_LOS_0:3 are inputs to the IXF1104. These signals are pulled to a logic Low level by the optical module during normal operation, which indicates that no loss-of-signal exists. If a loss-of- signal occurs, a logic High is received on these inputs through the use of an external pull-up resistor at the IXF1104 device pad.

The status of each bit (one for each port) is found in “Optical Module Status Ports 0-3 ($0x799)" bits [23:20]. Any change in the state of these bits causes a logic Low level on the RX_LOS_INT output if this operation is enabled.

5.7.2.2.4TX_DISABLE_0:3

TX_DISABLE_0:3 are outputs from the IXF1104. These signals are driven to a logic Low level by the IXF1104 during normal operation. This indicates that the optical module transmitter is enabled. If the optical module transmitter is disabled, this signal is switched to a logic High level. On the IXF1104, these outputs are open drain types and pulled up by the 4.7 k to 10 k pull-up resistor at the Optical Module Interface. Each of these signals is controlled through bits 3:0 respectively of the “Optical Module Control Ports 0 - 3 ($0x79A)".

5.7.2.2.5MOD_DEF_INT

MOD_DEF_INT is a single output, open-drain type signal and is active Low. A change in state of any MOD_DEF_0:3 inputs causes this signal to switch Low and remain in this state until a read of the “Optical Module Status Ports 0-3 ($0x799)". The signal then returns to an inactive state.

5.7.2.2.6TX_FAULT_INT

TX_FAULT_INT is a single output, open-drain type signal and is active Low. A change in state of any TX_FAULT_0:3 inputs causes this signal to switch Low and remain in this state until a read of the “Optical Module Status Ports 0-3 ($0x799)". The signal then returns to an inactive state.

5.7.2.2.7RX_LOS_INT

RX_LOS_INT is a single output, open-drain type signal and is active low. A change in state of any of the RX_LOS_3:0 inputs causes this signal to switch low and remain in this state until a Read of the “Optical Module Status Ports 0-3 ($0x799)" has taken place. The signal returns to an inactive state.

108 Datasheet

Document Number: 278757

Revision Number: 007

Revision Date: March 25, 2004