Standby Mode - Fujitsu F2MC-16LX Hardware Manual

6.5

Standby Mode

The standby mode is divided into three modes, namely, the sleep (PLL sleep, main
sleep, and sub sleep), clock, and stop modes.
Operational states in standby mode
Table 6.5-1 "Operational states in standby mode" lists operational states in the standby mode.
Table 6.5-1 Operational states in standby mode
Standby mode
PLL sleep
mode
Sleep mode Main sleep
mode
Sub sleep
mode
Timebase
timer mode
(SPL = 0)
Timebase
timer mode
Timebase
timer mode
(SPL = 1)
Watch mode
(SPL = 0)
Watch mode
Watch mode
(SPL = 1)
Stop mode
(SPL = 0)
Stop mode
Stop mode
(SPL = 1)
*1: The timebase timer and watch timer are operating.
*2: The watch timer is operating
SPL: Pin-state specification bit of low-power consumption mode control register (LPMCR)
SLP: Sleep mode bit of low-power consumption mode control register (LPMCR)
STP: Stop mode bit of low-power consumption mode control register (LPMCR)
TMD: Clock/timebase timer mode bit of low-power consumption mode control register (LPMCR)
MCS: Machine clock selection bit of the clock selection register (CKSCR)
SCS: Machine clock selection bit (Sub) of the clock selection register (CKSCR)
Hi-Z: High impedance
RST: External-reset pin
Change
Main clock Sub-clock
condition
SCS = 1
MCS = 0
SLP = 1
In operation
SCS = 1
MCS = 1
SLP = 1
SCS = 0
Stopped
SLP = 1
SCS = 1 In operation
TMD = 0
In operation
SCS = 1
TMD = 0
SCS = 0
TMD = 0
SCS = 0
TMD = 0
Stopped
STP = 1
Stopped
STP = 1
CHAPTER 6 LOW-POWER CONSUMPTION MODE
Machine
CPU Peripheral
clock
In operation In operation
Stopped (*1)
Stopped
Stopped
Stopped (*2)
Stopped
Cancellation
Pin
method
In operation
Hold
Reset or
interrupt
Hi-Z
Hold
Hi-Z
Hold
Hi-Z
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