UPD78F0138 NEC, UPD78F0138 Datasheet - Page 396

• Manufacturer Part Number: UPD78F0138
• Description: (UPD78xxxx) 8-Bit Single-Chip Microcontrollers
• Manufacturer: NEC

396
Ring-OSC clock
X1 input clock
Note The port pins become high impedance, except for P130, which is set to low-level output.
Remark For the reset timing of the power-on-clear circuit and low-voltage detector, see CHAPTER 22 POWER-
reset signal
CPU clock
Port pin
RESET
Internal
ON-CLEAR CIRCUIT and CHAPTER 23 LOW-VOLTAGE DETECTOR.
operation
Normal
Figure 20-4. Timing of Reset in STOP Mode by RESET Input
STOP instruction execution
(Oscillation stop)
Stop status
CHAPTER 20 RESET FUNCTION
User’s Manual U16228EJ2V0UD
Delay
(Oscillation stop)
Reset period
Delay
Operation stop
(17/f
R
)
Hi-Z
Normal operation
(Reset processing, Ring-OSC clock)
Note