HD6417641 RENESAS [Renesas Technology Corp], HD6417641 Datasheet - Page 214

• Manufacturer Part Number: HD6417641
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 6 Power-Down Modes
Table 6.1
Note:
6.1.2
A reset is used at power-on or to re-execute from the initial state. This LSI supports two types of
reset: power-on reset and manual reset. In power-on reset, any processing to be currently executed
is terminated and any events not executed are canceled to execute reset processing immediately. In
manual reset, processing required to maintain external memory contents is continued. The
following shows the conditions in which power-on reset or manual reset occurs.
• Power-on reset
Rev. 4.00 Sep. 14, 2005 Page 164 of 982
REJ09B0023-0400
Mode
Sleep mode
Standby mode
Module standby
function
1. A low level signal is input to the RESETP pin.
2. The WDT counter overflows if WDT starts counting while the WT/IT and RSTS bits of the
3. An H-UDI reset occurs. (For details on H-UDI reset, refer to section 15, User Debugging
WTCSR are set to 1 and cleared to 0, respectively.
Interface (H-UDI).)
*
Reset
The pin state is retained or set to high impedance. For details, see Appendix A, Pin
States.
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 the MSTP bits in
STBCR, STBCR2,
STBCR3, and STBCR4
to 1 (with the exception
of the MSTP bits for the
USB module; clear these
bits).
States of Power-Down Modes
CPG
Runs
Halts
Runs
CPU
Halts
Halts
Runs
CPU
Register
Held
Held
Held
On-Chip
Halts
(The contents
Halts
(The contents
The specified
module stops
(the contents are
retained).
Memory
are retained.)
are retained.)
State*
On-Chip
Peripheral
Modules
The UBC stops.
Other modules
continue to run.
Halt
Specified
module halts
External
Memory
Refreshed
automati-cally
Self-refreshed 1.
Refreshed
automati-cally
Canceling
Procedure
1.
2.
2.
1.
2.
Interrupt
Reset
Interrupt
Reset
Clear MSTP bit to
0. (with the
exception of the
MSTP bits for the
USB module; set
these bits).
Power-on reset