![IXYS zilog Z51F6412 Manual Download Page 148](http://html1.mh-extra.com/html/ixys/zilog-z51f6412/zilog-z51f6412_manual_2098946148.webp)
Z51F6412
Product Specification
PS030302-0212
P R E L I M I N A R Y
145
12. Power Down Operation
12.1 Overview
The Z51F6412 MCU features three power-down modes to minimize the power consumption of the
device. In power down mode, power consumption is reduced considerably. The device provides three
kinds of power saving functions, IDLE, STOP1 and STOP2 mode. In three modes, program is stopped.
12.2 Peripheral Operation in IDLE/STOP Mode
Table 12-1 Peripheral Operation during Power Down Mode.
Peripheral
IDLE Mode
STOP1 Mode
STOP2 Mode
CPU
ALL CPU Operation
are Disable
ALL CPU Operation are Disable
ALL CPU Operation are Disable
RAM Retain
Retain
Retain
Basic Interval
Timer
Operates
Continuously
Operates Continuously
Stop
Watch Dog
Timer
Operates
Continuously
Operates Continuously
Stop
Watch Timer
Operates
Continuously
Stop (Only operate in sub clock mode)
Stop (Only operate in sub clock mode)
Timer
Operates
Continuously
Halted (Only when the Event Counter
Mode is Enable, Timer operates
Normally)
Halted (Only when the Event Counter
Mode is Enable, Timer operates
Normally)
ADC
Operates
Continuously
Stop Stop
BUZ
Operates
Continuously
Stop Stop
SPI/SCI
Operates
Continuously
Only operate with external clock
Only operate with external clock
I2C
Operates
Continuously
Stop Stop
Internal OSC
(16MHz)
Oscillation Stop
Stop
Main OSC
(1~10MHz)
Oscillation Stop
Stop
Sub OSC
(32.768kHz)
Oscillation Oscillation
Oscillation
Internal
RCOSC
(125kHz)
Oscillation Oscillation
Stop
I/O Port
Retain
Retain
Retain
Control
Register
Retain Retain
Retain
Address Data
Bus
Retain Retain
Retain
Release
Method
By RESET, all
Interrupts
By RESET,Timer Interrupt (EC0,2,3,4,5),
SIO (External clock), External Interrupt,
UART by ACK PCI, I2C (slave mode),
WT (sub clock), WDT, BIT
By RESET,Timer Interrupt (EC0,2,3,4,5),
SIO (External clock), External Interrupt,
UART by ACK PCI, I2C (slave mode),
WT (sub clock)