Z80 Datasheet, PDF (227/330 Pages) Zilog, Inc. – Z80 CPU PERIPHERALS

Z80 CPU Peripherals
User Manual
207
Serial Input/Output
OVERVIEW
The Z80 Serial Input/Output (SIO) is a dual-channel multi-function
peripheral component designed to satisfy a wide variety of serial data
communications requirements in microcomputer systems. The Z80 SIO
functions as a serial-to-parallel, parallel-to-serial converter/controller, and
is systems-software configurable to allow optimization for a given serial
data communications application.
The Z80 SIO is capable of handling asynchronous and synchronous byte-
oriented protocols such as IBM Bisync and synchronous bit-oriented
protocols such as HDLC and IBM SDLC. This versatile device also
supports virtually any other serial protocol for applications other than data
communications, such as cassette or floppy disk interfaces.
The Z80 SIO can generate and check CRC codes in any synchronous mode
and can be programmed to check data integrity in various modes. The
device also has features for modem controls in both channels. In applica-
tions where these controls are not needed, the modem controls can be used
for general-purpose I/O.
FEATURES
• CMOS and NMOS Version
• 40-Pin DIP, 44-Pin PLCC/QFP Packages
• Single 5V Power Supply
• Single-Phase 5V Clock
UM008101-0601
Serial Input/Output