Configurable two-wire interface module
View Patent ↗A telecommunications system and constituent two-wire interface module. The two wire interface module includes a logic component configured to communicate over the same pair of wires using different two-wire interface protocols depending on an input signal presented on a configuration input. This configurability allows the two-wire interface module to use the same two wires to communicate with a variety of other two-wire interface modules, even if those two-wire interface modules communicate using different two-wire interface protocols.
1. An optical transceiver, the optical transceiver including:
a laser driver;
a post-amplifier; and
a digital core component, wherein the digital core component includes:
a register array component, wherein the register array component is configured to store one or more control values which control the laser driver and post-amplifier;
a slave component, wherein the slave component is configured to read data from and write data to the register array component; and
a boot component, wherein the boot component includes:
a two-wire interface module, the two-wire interface module including:
a first two-wire interface, wherein the first two-wire interface is configured to transmit data to and receive data from the slave component; and
wherein the first two-wire interface includes:
a first interface wire; and
a second interface wire;
a second two-wire interface, wherein the second two-wire interface is configured to transmit data to and receive data from an external control source; and
wherein the second two-wire interface includes:
a third interface wire; and
a fourth interface wire;
a configuration input; and
a logic component configured to:
communicate over the first two-wire interface with the slave component using a first two-wire interface protocol;
communicate over the second two-wire interface using a first two-wire interface protocol when the configuration input receives a first input signal correlating to the first two-wire interface protocol;
communicate over the second two-wire interface using the second two-wire interface protocol when the configuration input receives a second input signal correlating to the second two-wire interface protocol,
wherein the slave component includes a FSB slave component and the first two-wire interface protocol includes the Finisar Serial Bus (FSB) two-wire interface protocol and the Finisar Serial Bus (FSB) two-wire interface protocol includes:
a preamble field;
a frame start field;
an operation field;
a device identifier field;
a basic address field;
a first bus turnaround field;
a data field;
a second bus turnaround field; and
a frame end field.
2. An optical transceiver in accordance with claim 1 , wherein the Finisar Serial Bus (FSB) two-wire interface protocol further includes:
an extended field;
an bus hold field;
an cyclic redundancy checking field;
an acknowledgement field; and
an error status field.
3. An optical transceiver in accordance with claim 1 , wherein the logic component includes a master component, wherein the master component is configured to communicate with the slave component over the first two-wire interface module and wherein:
the first wire is configured to transmit a clock signal; and
the second wire is configured to transmit a data signal.