AM7968-125JC datasheet(120/127 Pages) AMD

120 / 127 page

AMD

116

TAXIchip Integrated Circuits Technical Manual

Jumpers are provided on the outputs of Q4 and Q5 to be inverted (U7) and fed back to

the first NAND gate (U1). If Q4 is shorted back to the strobe input, the system will run in

auto-repeat ACK 0 mode. This means that there will be a strobe on every clock cycle. In

this mode a sync will never be sent. If the output of Q5 is shorted back to the strobe

input, the system will run in

auto-repeat ACK 1 mode. This means that a sync will be

automatically inserted in between each group of four data bytes.

On the receiver end of the link, the option is left up to the designer to either use four

Am7969 TAXI Receivers or to demultiplex the data and use only one Receiver.

Figure 16 has been included to give a detailed schematic of the circuit with an Am7969

TAXI Receiver on-board to complete the data path. Figures 17, 18, and 19 show typical

outputs for auto-run ACK0, auto-run ACK1 and Normal run modes.

V. CONCLUSION

To increase the length of a data word beyond eight bits, multiplex the data into an

Am7968 TAXI Transmitter. This method uses less power, less board space, and lowers

the parts cost of the system.

AM7968-125JC 数据表(PDF) 120 Page - Advanced Micro Devices