ez80l92 ZiLOG Semiconductor, ez80l92 Datasheet - Page 40

• Manufacturer Part Number: ez80l92
• Description: Ez80acclaim Flash Microcontrollers
• Manufacturer: ZiLOG Semiconductor

Low-Power Modes
PS013014-0107
SLEEP Mode
HALT Mode
The eZ80L92 MCU provides a range of power-saving features. The highest level of power
reduction is provided by SLEEP mode. The next level of power reduction is provided by
the HALT instruction. The lowest level of power reduction is provided by the clock
peripheral power-down registers.
Execution of the eZ80 CPU’s SLP instruction places the eZ80L92 MCU into SLEEP
mode. In SLEEP mode, the operating characteristics are:
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The eZ80 CPU can be brought out of SLEEP mode by any of the following operations:
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After exiting SLEEP mode, the standard RESET delay occurs to allow the primary crystal
oscillator to stabilize. See
Execution of the eZ80 CPU’s HALT instruction places the eZ80L92 MCU into HALT
mode. In HALT mode, the operating characteristics are:
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Primary crystal oscillator is disabled.
System clock is disabled.
eZ80 CPU is idle.
Program counter (PC) stops incrementing.
32 kHz crystal oscillator continues to operate and drives the Real-Time Clock and the
Watchdog Timer (if WDT is configured to operate from the 32 kHz oscillator.)
RESET through the external RESET pin driven Low.
RESET through a Real-Time Clock alarm.
RESET through a Watchdog Timer time-out (if running off of the 32 kHz oscillator and
configured to generate a RESET upon time-out).
RESET through execution of a Debug RESET command.
Primary crystal oscillator is enabled and continues to operate.
System clock is enabled and continues to operate.
eZ80 CPU is idle.
Program counter stops incrementing.
Reset on page
33.
Product Specification
Low-Power Modes
34