Zilog Z08470 - Manual (Page 321)

Z80 CPU Peripherals
User Manual
UM008101-0601 Serial Input/Output
301
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.
V0
V1*
V2*
V3*
D7 D6 D5 D4 D3 D2 D1 D0
Interrupt
V4
V5
V6
V7
Vector
*Variable if ‘Status Affects Vector’ is programmed