tmp86c408idmg TOSHIBA Semiconductor CORPORATION, tmp86c408idmg Datasheet - Page 28
tmp86c408idmg
Manufacturer Part Number
tmp86c408idmg
Description
Cmos 8-bit Microcontroller
Manufacturer
TOSHIBA Semiconductor CORPORATION
Datasheet
1.TMP86C408IDMG.pdf
(152 pages)
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2.2 System Clock Controller
2. Operational Description
STOP pin
XOUT pin
STOP mode started
by the program.
NORMAL
operation
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
Figure 2-8 Edge-sensitive Release Mode
RESET
pin input must also be “H” level, rising together with the power supply voltage. In this
operation
STOP
Return to NORMAL Mode
12.288
4.096
3.072
1.024
Page 18
Warm-up Time [ms]
V
IH
Warm up
STOP mode is released by the hardware at the rising
edge of STOP pin input.
RESET
Return to SLOW Mode
pin drops below the non-inverting high-level
NORMAL
operation
5.85
1.95
750
250
RESET
RESET
pin, which immediately
pin input voltage will
operation
STOP
TMP86C408IDMG
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