DESCRIPTION

The HD648180W is an 8-bit CMOS microcontroller in the

HD64180 family. Its instruction set is upward-compatible

with the HD64180Z, hence with the Z-80. Twelve instructions (seven types) have been added, bringing the total number of instructions to 165.

Compared with the HD64180Z, the HD648180W also has

more peripheral functions. In addition to a refresh controller

and wait-state controller for memory access support, and a

memory management unit (MMU) and DMA controller

(DMAC) for processing large quantities of data, the

HD64180W has on-chip RAM, EEPROM, and an A/D converter. Timer and I/O-port functions have also been enhanced.

Figure 1 shows the HD64180 family. Table 1 lists the features of the HD64180W.