Scc/escc user manual – Zilog Z80230 User Manual

Page 240

Advertising
background image

SCC/ESCC

User Manual

UM010903-0515

Application Notes

233

Z180 to SCC Interface Logic (Example)

T1

T2

Tw

T3

1

6

100 ns

11

28

70 ns max

55 ns max

20 ns max

10 ns max

10 ns min

28

50 ns max

20 ns max

10 ns max

10 ns max

10 ns max

10 ns max

Address

/IORQ

/SCCSEL

HC74 /Q

HCT164 /CLR

HCT164 CLK

HCT164 Q0

20 ns max

20 ns max

HCT164 Q1

20 ns max

20 ns max

/RD (or, /WR)

RD* Q1

*SCCSEL

/SCCRD /[(RD*

/Q1* SCCSEL)

+ RESET]

15 ns max

9

55 ns max

15 ns max
30 ns ( > 0 ns)

200 ns typ. ( > 125 ns)

55 ns max

13

15 ns max

15 ns max

> 0 ns

Data (RD)

/SCCWR

Data (RD)

25

15

> 25 ns

120 ns max

SCC

Valid Data

Advertising
This manual is related to the following products: