Z80 Datasheet, PDF (321/330 Pages) Zilog, Inc. – Z80 CPU PERIPHERALS

Z80 CPU Peripherals
User Manual
301
D7 D6 D5 D4 D3 D2 D1 D0
*Variable if ‘Status Affects Vector’ is programmed
V0
V1*
V2*
V3* Interrupt
V4
Vector
V5
V6
V7
Figure 124. Read Register 2 (Channel B Only)
APPLICATIONS
Overview
Flexibility and versatility make the Z80 SIO useful for numerous applica-
tions, a few of which are described here. These examples demonstrate
how several applications combine the Z80 SIO with other members of the
Z80 family.
Figure 125 depicts simple processor-to-processor communication over a
direct line. Both remote processors in this system communicate to the Z80
CPU with different protocols and data rates. Depending on the complexity
of the application, other Z80 peripheral circuits (Z80 CTC, for example)
may be required. The unused Z80 SIO channel is available to control other
peripherals or to connect with remote processors.
UM008101-0601
Serial Input/Output