z80189 ZiLOG Semiconductor, z80189 Datasheet - Page 298
z80189
Manufacturer Part Number
z80189
Description
Z80180, Z8s180, Z8l180 Mpu Operation
Manufacturer
ZiLOG Semiconductor
Datasheet
1.Z80189.pdf
(326 pages)
- Current page: 298 of 326
- Download datasheet (5Mb)
282
REQUEST PRIORITY
UM005003-0703
Request
Note: * Not acceptable when DMA Request is in level-sense.
MC: Machine Cycle
Z8018x
Family MPU User Manual
:
Same as above.
Internal
I/O
Interrupt
NMI
Current
Status
Normal
Operation
(CPU mode
and IOSTOP
Mode)
Table 53.
The Z80180 features three types of requests.
.
Table 54. The Z80180 Types of Requests
Type 1, Type 2, and Type 3 requests priority as follows.
•
•
Type 1
Type 2
Type 3
Highest priority Type 1 > Type 2 > Type 3 lowest priority
Each request priority in Type 2 is shown as follows. highest priority
Bus Req. > Refresh Req. > DMA Request lowest priority
WAIT State
Request Acceptances in Each Operating Mode
Accepted in specified state
Accepted in each machine cycle
Accepted in each instruction
Refresh
Cycle
Interrupt
Acknowledge
Cycle
Not acceptable
Interrupt
acknowledge
cycle precedes.
NMI is accepted
after executing
DMA Cycle
Acceptable
DMA cycle
stops
Refresh Request, DMA
Request, and Bus Request.
Interrupt Request
WAIT
BUS
RELEASE
Mode
SLEEP
Mode
SYSTEM
STOP
Mode
Not
acceptable
Acceptable
Return from
SYSTEM
STOP mode
to normal
operation
Related parts for z80189
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Ez80f91 Mini Enet Module
Manufacturer:
ZiLOG Semiconductor
Datasheet:
Part Number:
Description:
Development Boards & Kits - Other Processors ZiLOG TCP/IP Software Suite (ZTP Rev 1.4) - Object Code (Free download on www.zilog.com)
Manufacturer:
ZiLOG
Part Number:
Description:
Z90233, Z90234, And Z90231 Ezvision 200 Television Controller
Manufacturer:
ZiLOG Semiconductor
Datasheet:
Part Number:
Description:
Digital Television Controllers
Manufacturer:
ZiLOG Semiconductor
Datasheet:
Part Number:
Description:
Television Controllers
Manufacturer:
ZiLOG Semiconductor
Datasheet:
Part Number:
Description:
40-pin Low-cost Digital Television Controller
Manufacturer:
ZiLOG Semiconductor
Datasheet:
Part Number:
Description:
40-pin Low-cost Digital Television Controller
Manufacturer:
ZiLOG Semiconductor
Datasheet:
Part Number:
Description:
Digital Television Controller In-circuit Emulator Ice Device
Manufacturer:
ZiLOG Semiconductor
Datasheet:
Part Number:
Description:
Digital Television Controller
Manufacturer:
ZiLOG Semiconductor
Datasheet:
Part Number:
Description:
Digital Television Controller
Manufacturer:
ZiLOG Semiconductor
Datasheet:
Part Number:
Description:
High Performance Microcontrollers
Manufacturer:
ZiLOG Semiconductor
Datasheet:
Part Number:
Description:
Cmos Usc Universal Serial Controller
Manufacturer:
ZiLOG Semiconductor
Datasheet:
Part Number:
Description:
Iusc Integrated Universal Serial Controller
Manufacturer:
ZiLOG Semiconductor
Datasheet:
Part Number:
Description:
16-bit Processor
Manufacturer:
ZiLOG Semiconductor
Datasheet:
Part Number:
Description:
Pcmcia Interface Solution
Manufacturer:
ZiLOG Semiconductor
Datasheet: