Method of accessing stored information in multi-framed data transmissions

Abstract

The present invention discloses a method of accessing stored information in multi-framed data transmissions, comprising at least one control interface and at least one elastic store, wherein the control interface accesses the elastic store through a mailbox communications method. The control interface accesses the elastic store via the mailbox communications method, which comprises: (a) setting a address for a data location within said elastic store; (b) setting a request to read from, or write to, said data location within said elastic store; (c) issuing a 'GO' signal to retrieve data information from said data location within said elastic store, by writing said 'GO' signal to said microprocessor, which causes a circuit to read from said requested data location within said elastic store; (d) waiting for a possible, but not to be expected, de-assertion of a busy signal to be issued from said data location within said elastic store, and then; and then (e) reading back the value of said data information to said control interface. Where a busy signal occurs, the microprocessor must wait and issue a subsequent “GO” signal to retrieve the data information from the data location; where a busy signal does not occur the “GO” signal causes the circuit to read from the requested data location and send the data information hack to the microprocessor, where the data information is stored in a user-accessible register.