Intel387TM

In the following signal descriptions, the Intel387 SX Math CoProcessor pins are grouped by function as shown by Table 4-1. Table 4-1 lists every pin by its identifier, gives a brief description and lists some of the characteristics of the Intel387TM (Refer to Figure 1-1 and Table 1-1 for pin configuration).

All output signals of the Intel387TM can be tri-stated by driving STEN inactive. The output buffers of the bi-directional data pins D15±D0 are also tri-state; they only leave the floating state during read cycles when the Math Co- Processor is selected.