User manual

218

µPD750008 USER'S MANUAL

Figure 7-1. Standby Mode Release Operation (2/2)

(d) Release of the HALT mode by the occurrence of an interrupt

Note The following two wait times can be selected by a mask option:

(21.8 ms at 6.00 MHz, 31.3 ms at 4.19 MHz)

(5.46 ms at 6.00 MHz, 7.81 ms at 4.19 MHz)

However, the µPD75P0016 dose not have a mask option and its wait time is fixed to 2

Remark The dashed line indicates the case where the interrupt request that releases the standby mode

is accepted.

When the STOP mode is released by the occurrence of an interrupt, a wait time is determined by the basic

interval timer mode register (BTM). (See Table 7-2.)

A time required for stable oscillation varies with the type of resonator used and the supply voltage at the

time of STOP mode release. Accordingly, a wait time is to be selected according to each application, and

BTM is to be set before the STOP mode is set.

HALT instruction

Standby 

release 

signal

Clock

HALT mode Operating mode

Oscillation

Operating mode

HALT instruction

RESET

signal

Clock

Operating 

mode HALT mode

Operating 

mode

Oscillation

Wait

Note