tmp88cu74 TOSHIBA Semiconductor CORPORATION, tmp88cu74 Datasheet - Page 17

• Manufacturer Part Number: tmp88cu74
• Description: Cmos 8-bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

Note: The warming-up time is obtained by dividing the basic clock by the divider: therefore, the
Note: When STOP mode is released with a low hold voltage, the following cautions must be
WUT
00
01
10
11
Table 1.4.2 Warming-up Time Example (at fc = 12.5 MHz, fs = 32.8 kHz)
warming-up time may include a certain amount of error if there is any fluctuation of the
oscillation frequency when STOP mode is released. Thus, the warming-up time must be
considered an approximate value.
observed.
The power supply voltage must be at the operating voltage level before releasing STOP
mode. The
voltage. In this case, if an external time constant circuit has been connected, the
pin input voltage will increase at a slower pace than the power supply voltage. At this time,
there is a danger that a reset may occur if input voltage level of the
the non-inverting high-level input voltage (hysteresis input).
3.
When the warming-up time has elapsed, normal operation resumes with the
instruction following the STOP mode start instruction (e.g. [SET (SYSCR1). 7]).
The start is made after the prescaler and the divider of the timing generator are
cleared to “0”.
which immediately performs the normal reset operation.
STOP mode can also be released by inputting low level on the
DV1CK = 0
RESET
15.729
5.243
3.932
1.311
Return to NORMAL mode
pin input must also be “H” level, rising together with the power supply
Warming-up Time [ms]
88CU74-17
DV1CK = 1
31.457
10.486
7.864
2.621
Return to SLOW mode
750
250


RESET
pin drops below
TMP88CU74
2007-10-19
2003-02-17
RESET
RESET
pin,