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User’s Manual U10676EJ3V0UM
CHAPTER 9 RESET FUNCTION9.1 Configuration and Operation of Reset Function

Three types of reset signals are used: the external reset signal (RESET), a reset signal from the basic interval

timer/watchdog timer, and a key return reset. When any one of these reset signals is input, the internal reset signal

is asserted. Figure 9-1 shows the configuration of the reset circuit.

Figure 9-1. Configuration of Reset Circuit

V
DD
Mask option
KRREN
RESET
QR
S
QS
R
QS
R
Instruction
STOP mode
KRF
WDF
Watchdog timer overflow
Internal reset signal
Instruction
One-shot pulse generator
V
DD
Mask option
P70/KR4
P71/KR5
P72/KR6
P73/KR7

Internal bus

Falling edge detector
Interrupt

When the RESET signal is generated, each hardware unit is initialized as shown in Table 9-1. Figure 9-2 shows

the timing of the reset operation.