z8f0822 ZiLOG Semiconductor, z8f0822 Datasheet - Page 58

• Manufacturer Part Number: z8f0822
• Description: High Performance 8-bit Microcontrollers
• Manufacturer: ZiLOG Semiconductor

Low-Power Modes
STOP Mode
HALT Mode
PS022517-0508
Caution:
Z8 Encore! XP
of power reduction is provided by STOP mode. The next level of power reduction is pro-
vided by the HALT mode.
Execution of the eZ8 CPU’s STOP instruction places the device into STOP mode. In
STOP mode, the operating characteristics are:
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•
•
•
•
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To minimize current in STOP mode, WDT must be disabled and all GPIO pins configured
as digital inputs must be driven to one of the supply rails (V
brought out of STOP mode using Stop Mode Recovery. For more information on Stop
Mode Recovery, see
Execution of the eZ8 CPU’s HALT instruction places the device into HALT mode. In
HALT mode, the operating characteristics are:
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Primary crystal oscillator is stopped; the XIN pin is driven High and the XOUT pin is
driven Low.
System clock is stopped.
eZ8 CPU is stopped.
Program counter (PC) stops incrementing.
If enabled for operation in STOP Mode, the WDT and its internal RC oscillator
continue to operate.
If enabled for operation in STOP mode through the associated Option Bit,
the VBO protection circuit continues to operate.
All other on-chip peripherals are idle.
Primary crystal oscillator is enabled and continues to operate.
System clock is enabled and continues to operate.
eZ8 CPU is stopped.
Program counter stops incrementing.
STOP Mode must not be used when driving the Z8F082x family devices with an ex-
ternal clock driver source.
®
F0822 Series products contain power-saving features. The highest level
Reset and Stop Mode Recovery
on page 39.
Z8 Encore! XP
CC
or GND). The device can be
Product Specification
®
Low-Power Modes
F0822 Series
45