8-Bit Magnitude Comparator
COMPM8 is an 8-bit, magnitude comparator that compares two positive binary-weighted words A7 – A0 and B7 – B0, where A7 and B7 are the most significant bits. The greater-than output (GT) is High when A>B, and the less-than output (LT) is High when A<B. When the two words are equal, both GT and LT are Low. Equality can be measured with this macro by comparing both outputs with a NOR gate. Refer to the “COMPM4” section earlier in this chapter for a representative truth table.
Parameters
| Parameter | Description | Units | Default |
|---|---|---|---|
| DELAY | Propagation delay. | s | DGTDELAY |
| IN_MODE | Inputs mode. | IN | |
| OUT_MODE | Outputs mode. | OUT | |
| IOMODEL | The name of an I/O model, which describes the device’s loading and driving characteristics. | DGTDEFIOMODEL | |
| POWER_NODE | Digital power node name. Is the node used by the interface subcircuits which connect analog nodes to digital nodes. | $G_DPWR | |
| GROUND_NODE | Digital ground node name. Is the node used by the interface subcircuits which connect analog nodes to digital nodes. | $G_DGND |