UPD78F0838 Renesas Electronics Corporation., UPD78F0838 Datasheet - Page 758

• Manufacturer Part Number: UPD78F0838
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

756
(b) Release by reset signal generation
When the reset signal is generated, STOP mode is released, and then, as in the case with a normal reset
operation, the program is executed after branching to the reset vector address.
Remark f
Internal high-speed
(X1 oscillation)
Status of CPU
oscillation clock
system clock
Reset signal
Status of CPU
High-speed
Reset signal
Maskable interrupt
request
Reset signal input
: don’t care
X
Table 20-4. Operation in Response to Interrupt Request in STOP Mode
: X1 clock oscillation frequency
(2) When internal high-speed oscillation clock is used as CPU clock
Release Source
(1) When high-speed system clock is used as CPU clock
Normal operation
(internal high-speed
system clock)
Oscillates
Normal operation
(high-speed
oscillation clock)
Oscillates
Figure 20-7. STOP Mode Release by Reset
instruction
CHAPTER 20 STANDBY FUNCTION
Preliminary User’s Manual U19748EJ1V0UD
STOP
instruction
STOP
MK
Oscillation stopped
0
0
0
0
0
1
Oscillation stopped
STOP mode
STOP mode
PR
0
0
1
1
1
IE
Oscillation
0
1
0
1
Starting X1 oscillation is
stopped
period
Reset
specified by software.
Oscillation
stopped
period
Reset
accuracy stabilization
Wait for oscillation
ISP
(11 to 45 s)
Oscillation
processing
1
0
1
stopped
(86 to 361 s)
Reset
(11 to 45 s)
processing
Reset
Next address
instruction execution
Interrupt servicing
execution
Next address
instruction execution
Interrupt servicing
execution
STOP mode held
Reset processing
Oscillation stabilization time
(internal high-speed
Normal operation
oscillation clock)
(internal high-speed
Operation
Normal operation
Oscillates
oscillation clock)
(2
Oscillates
11
/f
X
to 2
16
/f
X
)