z80189 ZiLOG Semiconductor, z80189 Datasheet - Page 5
z80189
Manufacturer Part Number
z80189
Description
Z80180, Z8s180, Z8l180 Mpu Operation
Manufacturer
ZiLOG Semiconductor
Datasheet
1.Z80189.pdf
(326 pages)
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Table of Contents
Z80180, Z8S180, Z8L180 MPU Operation . . . . . . . . . . . . . . . . . . . .1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Pin Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Operation Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
CPU Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Wait State Generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
HALT and Low Power Operation Modes
Low Power Modes
Add-On Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
STANDBY Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
STANDBY Mode Exit wiht BUS REQUEST . . . . . . . . . . . . . . . . .38
STANDBY Mode EXit with External Interrupts . . . . . . . . . . . . . . .39
IDLE Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
STANDBY-QUICK RECOVERY Mode . . . . . . . . . . . . . . . . . . . .41
Internal I/O Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
MMU Register Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65
Interrupt Acknowledge Cycle Timings . . . . . . . . . . . . . . . . . . . . . .82
Interrupt Sources During RESET . . . . . . . . . . . . . . . . . . . . . . . . . . .83
Dynamic RAM Refresh Control . . . . . . . . . . . . . . . . . . . . . . . . . . .86
DMA Controller (DMAC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90
Asynchronous Serial Communication Interface (ASCI) . . . . . . . .115
(Z80180-Class Processors Only) . . . . . . . . . . . . . . . . . . . . . . . .31
(Z8S180/Z8L180 only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
Family MPU User Manual
UM005003-0703
Z8018x
v
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