h8s-2111b Renesas Electronics Corporation., h8s-2111b Datasheet - Page 502

• Manufacturer Part Number: h8s-2111b
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family / H8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

20.2
Figure 20.1 shows the enabled mode transition diagram. The mode transition from program
execution state to program halt state is performed by the SLEEP instruction. The mode transition
from program halt state to program execution state is performed by an interrupt. The STBY input
causes a mode transition from any state to hardware standby mode. The RES input causes a mode
transition from a state other than hardware standby mode to the reset state. Table 20.2 shows the
LSI internal states in each operating mode.
Rev. 1.00, 05/04, page 468 of 544
Notes: 1.
Program execution state
SLEEP instruction
SSBY = 1, PSS = 1,
DTON = 1, LSON = 0
After the oscillation
stabilization time
(STS2 to STS0), clock
switching exception
handling
Mode Transitions and LSI States
• When a transition is made between modes by means of an interrupt, the transition cannot be made
• Always select high-speed mode before making a transition to watch mode or sub-active mode.
2.
3.
on interrupt source generation alone. Ensure that interrupt handling is performed after accepting the
interrupt request.
NMI, IRQ0 to IRQ2, IRQ6, IRQ7, and WDT1 interrupts
NMI, IRQ0 to IRQ7, WDT0, WDT1, TMR0, and TMR1 interrupts
NMI, IRQ0 to IRQ2, IRQ6, and IRQ7 interrupts
SCK2 to
SCK0 are
0
High-speed mode
Subactive mode
Medium-speed
(main clock)
(main clock)
Reset state
(subclock)
mode
Figure 20.1 Mode Transition Diagram
: Transition after exception processing
RES pin = High
SCK2 to
SCK0 are
not 0
SLEEP instruction
SSBY = 1, PSS = 1,
DTON = 1, LSON = 1
Clock switching
exception handling
STBY pin = High
RES pin = Low
External
interrupt *
SLEEP instruction
Interrupt *
LSON bit = 0
SLEEP instruction
SLEEP
instruction
Interrupt *
Any interrupt
SLEEP
instruction
Interrupt *
LSON bit = 1
3
SLEEP
instruction
1
2
1
: Power-down mode
SSBY = 0, LSON = 0
SSBY = 1,
PSS = 0, LSON = 0
SSBY = 0,
PSS = 1, LSON = 1
SSBY = 1,
PSS = 1, DTON = 0
Program halt state
STBY pin = Low
Subsleep mode
standby mode
standby mode
Watch mode
Sleep mode
(main clock)
(subclock)
(subclock)
Hardware
Software