RX610 Group
6. Resets
R01UH0032EJ0120 Rev.1.20
Page 154 of 1006
Feb 20, 2013
6.
Resets
6.1
Overview
There are three types of reset: pin reset, deep software standby reset, and watchdog timer reset. Table 6.1 lists the reset
names and sources.
Table 6.1 Reset Names and Sources
Reset Name
Source
Pin reset
The RES# pin input voltage is driven low.
Deep software standby reset
Deep software standby mode is canceled by an interrupt.
Watchdog timer reset
The watchdog timer overflows.
The internal state and pins of the LSI are initialized by a reset. Figure 6.1 shows the targets to be initialized by each reset.
RSTSR, DPSBYCR,
DPSWCR, DPSIER,
DPSIFR, DPSIEGR,
FWEPROR
Deep software standby reset
Watchdog timer reset
Pin reset
RES#
Watchdog timer
Internal state other than
above and pin states
*
Deep software standby
reset generation circuit
Register for watchdog timer
RSTCSR
Registers related to power-down function
Note:
*
Pin states are initialized by a pin reset or watchdog timer reset, though not initialized by a deep software
standby reset. Pin states are retained from software standby mode, which is an intermediate state in the
transition to deep software standby mode.
Figure 6.1 Block Diagram of Reset Circuit