UPD753108 Datasheet, PDF (338/459 Pages) NEC – 4-bit Single-chip Microcontrollers

CHAPTER 7 STANDBY FUNCTION
Figure 7-1. Standby Mode Release Operation (2/2)
(c) HALT mode release when a RESET signal is generated
HALT instruction
Wait ^Note
RESET
signal
Operation mode
HALT mode
Operation mode
Clock
Oscillation
(d) HALT mode release when an interrupt occurs
HALT instruction
Standby
release
signal
Operation mode
Clock
HALT mode
Oscillation
Operation mode
Note The following two wait times can be specified by the mask option.
2¹⁷/fX (21.8 ms at 6.00 MHz, 31.3 ms at 4.19 MHz)
2¹⁵/fX (5.46 ms at 6.00 MHz, 7.81 ms at 4.19 MHz)
However, the µPD75P3116 has no mask options and it is fixed to 2¹⁵/fX.
Remark Broken line: When the interrupt request to release the standby mode is acknowledged.
When the STOP mode has been released by an interrupt, the wait time is determined by the setting of BTM (refer
to Table 7-2).
The time required for the oscillation to stabilize varies depending on the type of the resonator used and the supply
voltage when the STOP mode has been released. Therefore, select the appropriate wait time depending on a given
condition, and set BTM before setting the STOP mode.
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