Z80189 Datasheet, PDF (93/107 Pages) Zilog, Inc. – GENERAL-PURPOSE EMBEDDED CONTROLLERS

Zilog
PRELIMINARY
Z80189/Z8L189
GENERAL-PURPOSE EMBEDDED CONTROLLERS
Z189 MISCELLANEOUS CONTROL AND INTERFACE REGISTERS (Continued)
I/O and Memory Transactions
I/O Write
to On-Chip
Peripherals
Z80189
Data Bus
In
(DDOUT=0)
Z80189
Data Bus
In
(DDOUT=1)
I/O Read
from On-Chip
Peripherals
Out
Out
I/O Write
I/O Read
to Off-Chip from Off-Chip Write to Write from
Z80189
Peripherals Peripherals Memory Memory Refresh Idle Mode
Z
Z
Z
In
Z
Z
Z
Z
Z
In
Z
Z
Interrupt Acknowledge Transaction
Z80189
Data Bus
(DDOUT=0)
Z80189
Data Bus
(DDOUT=1)
Intack for
On-Chip
Peripheral
Out
Out
Intack for
Off-Chip
Peripheral
In
In
Figure 117. Data Bus Direction (Z80180 is Not Bus Master)
DS971890301
93