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R01UH0336EJ0102 Rev.1.02
Page 284 of 1538
Jul 17, 2014
V850E2/PG4-L
Section 8 Reset Controller
(1)
Internal Reset Signals
The reset controller manages the generation of all internal reset signals upon
occurrence of reset requests from various reset sources.
• System reset SYSRES
The system reset is generated by an external reset or the debug reset.
SYSRES is applied to all microcontroller components.
• CPU reset CPURES
The CPU reset is generated by all reset sources. CPURES is applied to the
master and checker CPU sub-systems (such as DMA and INTC).
• LVI clear reset LVICLR
The LVI clear reset is generated by all reset sources except the LVIRES.
• Peripheral reset PERRES
The peripheral reset is generated by all reset sources.
• Single-pin debugging reset LPDRES
The single-pin debugging reset (LPDRES) is a dedicated reset signal for
use in single-pin debugging. LPDRES is de-asserted when the power
supply is turned on. Once LPDRES is de-asserted, it remains in the same
state until the power supply is shut down or DCUTRST goes to the high
level.
(2)
Timing of De-Assertion of the External Reset Signal after the Power
Supply is Turned on
After the power supply is turned on, the external reset signal has to be kept at
the low level for more than 6 ms to secure the set up time for internal regulator.