A serial/parallel interface for interfacing the serial port of a microcontroller with parallel bus devices, and a protocol for communicating with the same. The interface operates to maximize through-put with minimum handshaking by incorporating logic within the interface itself to control data flow. A row/column count state machine in the interface accumulates serial clock pulses from the microcontroller and controls the latching of parallel output data. A read/write state machine accumulates addresses and controls the read/write operation in response to a command sent by the microcontroller in the serial data stream. The read/write state machine accumulates addresses in response to an interface clock derived from the serial clock from the microcontroller.
A serial-to-parallel/parallel-to-serial conversion engine provides a bi-directional interface between a serial TDM highway and a parallel TDM highway. The conversion engine includes a serial-to-parallel data conversion device receives a serially received data word and provides a parallel output data word. The conversion engine includes a serial data input interface that receives the serially received data word and provides a received data word. A serial-to-parallel mapping circuit receives the received data word and generates memory write control and write address signals. A memory device includes a first port responsive to the memory write control signals and write address signals for writing the received data word into the memory device, and a second port responsive to memory read control and read address signals for reading data from the memory device. Output interface circuitry generates the memory read control and read address signals, and receives output data from the memory device and reorders the bits of the parallel output data to provide the parallel data word. The conversion engine also includes a parallel-to-serial conversion device that receives a parallel received data word and provides a serial data word. The parallel-to-serial conversion device includes a memory device having a first port responsive to memory write control and write address signals, and a second port responsive to memory read control and read address signals. A parallel-to-serial mapping circuit receives the parallel received data word and generates the memory write control and write address signals to write a bit shuffled version of the parallel received data word into the memory device. A data output interface generates the memory read control and read address signals to perform reads from the memory device and receives output data from the memory device to provide the serial data word.
A read-write interface system and method for a peripheral device includes storing data to be processed by a peripheral device; receiving a set of input data bits; transferring the set of input data bits from the shift register to the latch circuit in a write operation; accessing a leading bit of the set of input data bits from the latch circuit in advance of a read operation; and enabling in a read operation the rest of the input data bits in the latch circuit to be transferred to the shift register to be output with the leading bit.
A hybrid serial/parallel bus interface method for a user equipment (UE) has a data block demultiplexing device. The data block demultiplexing device has an input configured to receive a data block and demultiplexes the data block into a plurality of nibbles. For each nibble, a parallel to serial converter converts the nibble into serial data. A line transfers each nibble's serial data. A serial to parallel converter converts each nibble's serial data to recover that nibble. A data block reconstruction device combines the recovered nibbles into the data block.
A hybrid serial/parallel bus interface method for a base station has a data block demultiplexing device. The data block demultiplexing device has an input configured to receive a data block and demultiplexes the data block into a plurality of nibbles. For each nibble, a parallel to serial converter converts the nibble into serial data. A line transfers each nibble's serial data. A serial to parallel converter converts each nibble's serial data to recover that nibble. A data block reconstruction device combines the recovered nibbles into the data block.
A hybrid serial/parallel bus interface for a base station has a data block demultiplexing device. The data block demultiplexing device has an input configured to receive a data block and demultiplexes the data block into a plurality of nibbles. For each nibble, a parallel to serial converter converts the nibble into serial data. A line transfers each nibble's serial data. A serial to parallel converter converts each nibble's serial data to recover that nibble. A data block reconstruction device combines the recovered nibbles into the data block.
