beautypg.com

Zilog Z16C35 User Manual

Page 317

background image

Application Note

Interfacing the ISCC™ to the 68000 and 8086

16-7

Figure 3. ISCC Interface to a 68000 Microprocessor

/UDS

/RESET

/UDS

/LDS

/DTACK

D15-0

A23-1

R//W

/IPL2

/IPL1

/IPL0

/BGACK

BG

/BR

Interrupt

Priority

Bus

Arbitration

Logic

Latch

Address

Decode

FC2
FC1
FC0

/RESET

/DS

/RD

/WR

WAIT/RDY

AD15-AD0

/AS

/UAS

R//W

/INTACK

/INT

/BUSREQ

/BUSACK

/BGACK

A1/A/B

A0/SCC/DMA

/CS

A2

Vcc

Vcc

/BGACK

16C35

68000

/BGACK

A1

/OE

D

Q

Vcc

A15-1

Latch

/OE

D

Q

A0

/BGACK

Vcc

Vcc

A23-16

Page 311 of 316

UM011002-0808