HD6417706 RENESAS [Renesas Technology Corp], HD6417706 Datasheet - Page 577

• Manufacturer Part Number: HD6417706
• Description: Renesas 32-Bit RISC Microcomputer Super RISC engine Family/SH7700 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

In the power-down modes, all CPU and some on-chip supporting module functions are halted.
This lowers power consumption.
The SH7706 has four power-down modes:
1. Sleep mode
2. Software standby mode
3. Module standby function (TMU, RTC, SCI, UBC, DMAC, DAC, ADC, and SCIF on-chip
4. Hardware standby mode
Table 22.1 shows the transition conditions for entering the modes from the program execution
state, as well as the CPU and supporting module states in each mode and the procedures for
canceling each mode.
Table 22.1 Power-Down Modes
Notes: 1. The RTC still runs if the START bit in RCR2 is set to 1 (see section 13, Realtime Clock
Mode
Sleep
mode
Software
standby
mode
Module
standby
function
Hardware
standby
mode
supporting modules)
2. Depends on the on-chip supporting module.
3. The RTC still runs if the START bit in RCR2 is set to 1. TMU does not run.
4. When the LSI enters sleep mode, the CPU halts.
Transition
Conditions
Execute SLEEP
instruction with
STBY bit cleared
to 0 in STBCR
Execute SLEEP
instruction with
STBY bit set to 1
in STBCR
Set MSTP bit of
STBCR to 1
Drive CA pin low
(RTC)). TMU still runs when output of the RTC is used as input to its counter (see
section 12, Timer Unit (TMU)).
TMU external pin: Held
SCI external pin: Reset
Section 22 Power-Down Modes
CPG
Runs Halts Held
Halts Halts Held
Runs Runs
Halts Halts Held
CPU
*
4
CPU
Reg-
ister
Held
On-Chip
Memory
Held
Held
Held
Held
State
On-Chip
Peripheral
Modules
Runs
Halts*
Specified
module
halts
Halts*
1
3
Rev. 4.00, 03/04, page 531 of 660
Pins
Held
Held
*
Held
2
External
Memory
Refresh
Self-
refresh
Refresh
Self-
refresh
Canceling
Procedure
1. Interrupt
2. Reset
1. Interrupt
2. Reset
1. Clear MSTP
2. Power-on
Power-on reset
bit to 0
reset