Z85233 Datasheet, PDF (303/317 Pages) Zilog, Inc. – The Zilog SCC Serial Communication Controller

Application Note
Interfacing the ISCC™ to the 68000 and 8086
APPLICATIONS EXAMPLES (Continued)
RESET
/RD
/WR
ALE
AD15-AD0
8086
System Address
Bus Lower
D
Q
Order Bits
A0
Latch
Chip
Select
Decode
A7
A6
/BHE
/RESET
/RD
/WR
/AS
AD15-AD0
A1/A/B
A0/SCC/DMA
/CS
16C35
/UAS
A19-A16
D
Q
Q
D
Latch
/OE
System
Address
Latch
/OE
Bus Upper
Order Bits
HOLD
*/RD//GT or
HLDA
/INTR
/INTA
RDY
Vcc
Vcc
BUS Arbitration and Timing
Synchronization
RDY Timing
Synchronizer
R/W
/DS
/BUSREQ
/BUSACK
/INT
/INTACK
WAIT/RDY
* maximum mode
Figure 4. ISCC Interface to an Intel 8086 Microprocessor
6-8
UM010901-0601