TMP86FS49AFG Toshiba Semiconductor, TMP86FS49AFG Datasheet - Page 36

• Manufacturer Part Number: TMP86FS49AFG
• Description: 8-Bit Microcontroller
• Manufacturer: Toshiba Semiconductor

2.2 System Clock Controller
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STOP mode is released by the following sequence.
Note 1: When the STOP mode is released, the start is made after the prescaler and the divider of the
Note 2: STOP mode can also be released by inputting low level on the
Note 3: When STOP mode is released with a low hold voltage, the following cautions must be observed.
Note 1: The warm-up time is obtained by dividing the basic clock by the divider. Therefore, the warm-up
Table 2-2 Warm-up Time Example (at fc = 16.0 MHz, fs = 32.768 kHz)
1. In the dual-clock mode, when returning to NORMAL2, both the high-frequency and low-
2. A warm-up period is inserted to allow oscillation time to stabilize. During warm up, all
3. When the warm-up time has elapsed, normal operation resumes with the instruction follow-
frequency clock oscillators are turned on; when returning to SLOW1 mode, only the low-
frequency clock oscillator is turned on. In the single-clock mode, only the high-frequency
clock oscillator is turned on.
internal operations remain halted. Four different warm-up times can be selected with the
SYSCR1<WUT> in accordance with the resonator characteristics.
ing the STOP mode start instruction.
timing generator are cleared to "0".
performs the normal reset operation.
The power supply voltage must be at the operating voltage level before releasing STOP mode.
The
case, if an external time constant circuit has been connected, the
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
input voltage (Hysteresis input).
WUT
time may include a certain amount of error if there is any fluctuation of the oscillation frequency
when STOP mode is released. Thus, the warm-up time must be considered as an approximate
value.
00
01
10
11
RESET
pin input must also be “H” level, rising together with the power supply voltage. In this
Return to NORMAL Mode
12.288
4.096
3.072
1.024
Page 20
Warm-up Time [ms]
RESET
Return to SLOW Mode
pin drops below the non-inverting high-level
5.85
1.95
750
250
RESET
RESET
pin, which immediately
pin input voltage will
TMP86FS49AFG