NEC PD17062 - Manual (Page 171)

171
µ
PD17062
14. RESET
The reset function is used to initialize device operation.
14.1 RESET BLOCK CONFIGURATION
Fig. 14-1 shows the configuration of the reset block.
Device reset is divided into reset by turning on V DD (power-on reset or V DD reset), and reset by CE pin (CE
reset).
The power-on reset block consists of a voltage detection circuit that detects the voltage applied to the V DD
pin, a power failure detection circuit, and a reset control circuit.
The CE reset block consists of a circuit that detects the rising edge of the signal input to the CE pin, and
a reset control circuit.
Fig. 14-1 Reset Block
X
OUT
X
IN
V
DD
CE
Power-on clear signal (POC)
Reset signal
IRES
RES
RESET
STOP instruction
R
S
Q
Selector
Timer carry FF
Timer FF block
Power failure detection block
Scaler
BTM0CY
flag read
STOP
instruction
Voltage
detection
circuit
Control register
System register
Stack
Program counter
Forced halt by
timer carry FF
Rising edge
detection
circuit
Timer carry
disable FF
Reset
control
circuit