NEC uPD78P078 User Manual
Page 552
552
CHAPTER 24 STANDBY FUNCTION
RESET
Signal
Operating
Mode
Clock
Reset
Period
STOP Mode
Oscillation Stop
Oscillation
Stabilization
Wait Status
Operating
Mode
Oscillation
Wait
(2
17
/f
x
: 26.2 ms)
STOP
Instruction
Oscillation
(c) Release by RESET input
The STOP mode is released and after the lapse of oscillation stabilization time, reset operation is carried
out.
Figure 24-5. STOP Mode Released by RESET Input
Remarks 1. f
X
: Main system clock oscillation frequency
2. Figures in parentheses apply to operation with f
X
= 5.0 MHz.
Table 24-4. Operation after STOP Mode Release
Release Source
MKxx
PRxx
IE
ISP
Operation
Maskable interrupt request
0
0
0
x
Next address instruction execution
0
0
1
x
Interrupt service execution
0
1
0
1
Next address instruction execution
0
1
x
0
0
1
1
1
Interrupt service execution
1
x
x
x
STOP mode hold
Test input
0
–
x
x
Next address instruction execution
1
–
x
x
STOP mode hold
RESET input
–
–
x
x
Reset processing
x: Don’t care