Z8681

Z8® Z8681/82 ROMless Microcomputer Product Specification March 1983 CoPyrighti983l;>yZilog, Inc. All rights reserved. No part of this..publication may be reproduced without the written parmissien of Zilog, Inc. The 1!>locmation in this publication is subject to change withoUt notice. Zilog Z8® Z8681/82 BOMless Microcomputer Product Specification Features General Description Complete microcomputer, 24 I/O lines, and up to 64K bytes of addressable external space each for program and data memory. 143-byte register file, including 124 general-purpose registers, three I/O port registers, and 16 status and control registers. Vectored, priority interrupts for I/O, counter/timers, and UART. On-chip oscillator that accepts crystal or external clock drive. The Z8681and Z8682 are ROMless versions of the Z8 single-chip microcomputer. The Z8682 is usually more cost effective. These products differ only slightly and can be used interchangeably with proper system design to provide maximum flexibility in meeting price and delivery needs. The Z8681182 offers all the outstanding features of the 28 family architecture except an on-chip program ROM. Use of external memory rather than a preprogrammed ROM enables this Z8 microcomputer March 1983 Full-duplex UART and two programmable 8-bit counter/timers, each with a 6-bit programmable prescaler. Register Pointer so that short, fast instructions can access anyone of the nine working-register groups. Low-power standby option that...