The Z80182/Z8L182 is a smart peripheral controller IC for

　　modem （in particular V. Fast applications）， fax， voice

　　messaging and other communications applications. It

　　uses the Z80180 microprocessor （Z8S180 MPU core）

　　linked with two channels of the industry standard Z85230

　　ESCC （Enhanced Serial Communications Controller）， 24

　　bits of parallel I/O， and a 16550 MIMIC for direct connection

　　to the IBM PC， XT， AT bus.

　　The Z80182/Z8L182 allows complete flexibility for both

　　internal PC and external applications. Also current PC

　　modem software compatibility can be maintained with the

　　Z80182/Z8L182 ability to mimic the 16550 UART chip. The

　　Z80180 acts as an interface between the ESCC? and

　　16550 MIMIC interface when used in internal applications，

　　and between the two ESCC channels in the external

　　applications. This interface allows data compression and

　　error correction on outgoing and incoming data. In external

　　applications， three 8-bit parallel ports are available for

　　driving LEDs or other devices. Figure 1 shows the Z80182/

　　Z8L182 block diagram， while the pin assignments for the

　　QFP and the VQFP packages are shown in Figures 2 and

　　3， respectively. All references in this document to the

　　Z80182， or Z182 refer to both the Z80182 and Z8L182.

　　Notes：

　　All Signals with a preceding front slash， “/”， are active Low， e.g.，

　　B//W （WORD is active Low）; /B/W （BYTE is active Low， only）。

　　Power connections follow conventional descriptions below：

　　Connection Circuit Device

　　Power VCC VDD

　　Ground GND VSS