HD6417320 RENESAS [Renesas Technology Corp], HD6417320 Datasheet - Page 558
HD6417320
Manufacturer Part Number
HD6417320
Description
Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6417320.pdf
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Section 13
13.8
13.8.1
This LSI enters hardware standby mode by driving the CA pin low. In hardware standby mode as
well as a standby mode entered by the SLEEP instruction, all modules stop other than the modules
that operate using the RTC clock.
Hardware standby mode differs from standby mode as follows:
1. Interrupts and manual reset cannot be accepted.
2. TMU does not operate.
3. RTC operates without power supply to the power supply pins other than that of RTC.
If the CA pin goes low, the operation differs according to the CPG status.
• During standby mode
• During WDT operation while the standby mode is canceled by an interrupt
• Sleep mode
Note that the CA pin must be brought low during hardware standby mode.
13.8.2
Hardware standby mode is canceled by power-on or reset. If the CA pin is pulled high while the
RESETP signal is low, clock oscillation starts. In this case, RESETP must be kept low until clock
oscillation has settled. If RESETP is then pulled high, the CPU initiates the power-on reset
processing. If an interrupt or manual reset is input, correct operation cannot be guaranteed.
Rev. 3.00
REJ09B0033-0300
Hardware standby mode is entered with the clock stopped.
Interrupts and manual reset cannot be accepted and TMU halts.
After standby mode is canceled and the CPU restarts operating, a transition to hardware
standby mode occurs.
After sleep mode is canceled and the CPU restarts operating, a transition to hardware standby
mode occurs.
Hardware Standby Mode
Transition to Hardware Standby Mode
Canceling the Hardware Standby Mode
Jan. 18, 2008
Power-Down Modes
Page 496 of 1458
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