Z8S180 Zilog., Z8S180 Datasheet - Page 52

• Manufacturer Part Number: Z8S180
• Description: ENHANCED Z180 MICROPROCESSOR
• Manufacturer: Zilog.

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
1FH
M PU Us e r M anual
UM005001-ZMP0400
).
Z 8018x Fam il y
Recovery Time
(Minimum)
1.5 Clock
–
1.5 Clock
8 + 1.5 Clock
2
(Normal
Recovery)
2
(Quick Recovery)
17
6
+ 1.5 Clock
+ 1.5 Clock
37