ZiLOG Z8 Series

Z8
®
CPU
User Manual
UM001604-0108 Serial Input/Output
129
Figure 120. SPI Data In/Out Configuration
P27 OUT
PIN
SPI Active
P27 IN
0 SOI D0 Enable
OPEN-DRAIN
Autolatch
P27
P20 OE
PIN
P20 IN
OPEN-DRAIN
R ≈ 500 K Ω
Autolatch
P20
SPI EN
SPI DO
P27 OE
SPI
SPI DO
SPI
Standard
Standard
1 P27 OUT
*SPI must be enabled with D0
D2
SCON
or
SPI DI
R ≈ 500 K Ω