z80189 ZiLOG Semiconductor, z80189 Datasheet - Page 52
z80189
Manufacturer Part Number
z80189
Description
Z80180, Z8s180, Z8l180 Mpu Operation
Manufacturer
ZiLOG Semiconductor
Datasheet
1.Z80189.pdf
(326 pages)
- Current page: 52 of 326
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Table 5. Power-Down Modes (Z8S180/Z8L180-Class Processors Only)
Power-
Down
Modes
SLEEP
I/O STOP
SYSTEM
STOP
IDLE †
STANDBY † Stop
† IDLE and STANDBY modes are only offered in the Z8S180. The minimum recovery time can
be achieved if INTERRUPT is used as the Recovery Source.
STANDBY Mode
CPU Core
Stop
Running
Stop
Stop
The Z8S180/Z8L180 is designed to save power. Two low-power
programmable power-down modes have been added:
•
•
The STANDBY/IDLE mode is selected by multiplexing bits 1 and 3 of
the CPU Control Register (CCR, I/O Address =
To enter STANDBY mode:
STANDBY mode
IDLE mode
On-Chip
I/O
Running
Stop
Stop
Stop
Stop
Osc.
Running Running
Running Running
Running Running
Running Stop
Stop
CLKOUT
Stop
Recovery
Source
RESET,
Interrupts
By
Programming
RESET,
Interrupts
RESET,
Interrupts,
BUSREQ
RESET,
Interrupts,
BUSREQ
Family MPU User Manual
1FH
).
Recovery Time
(Minimum)
1.5 Clock
–
1.5 Clock
8 + 1.5 Clock
2
(Normal
Recovery)
2
(Quick Recovery)
UM005003-0703
17
6
+ 1.5 Clock
+ 1.5 Clock
Z8018x
37
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