UPD78F0138 NEC, UPD78F0138 Datasheet - Page 390

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

(2) STOP mode release
390
X1 input clock
Ring-OSC clock
X1 input clock is
selected as CPU clock
when STOP instruction
is executed
Ring-OSC clock is
selected as CPU clock
when STOP instruction
is executed
The STOP mode can be released by the following two sources.
STOP mode
STOP mode release
Figure 19-5. Operation Timing When STOP Mode Is Released
Operation stopped
(oscillation stabilization time set by OSTS)
(17/f
CHAPTER 19 STANDBY FUNCTION
R
)
HALT status
User’s Manual U16228EJ2V0UD
Ring-OSC clock
Clock switched
by software
X1 input clock
X1 input clock