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Cpu user manual, Serial input/output, Figure 120. spi data in/out configuration – Zilog Z86193 User Manual

Page 136

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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 KΩ

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 KΩ