tmp86fh09amg TOSHIBA Semiconductor CORPORATION, tmp86fh09amg Datasheet - Page 28

• Manufacturer Part Number: tmp86fh09amg
• Description: 8 Bit Microcontroller Tlcs-870/c Series
• Manufacturer: TOSHIBA Semiconductor CORPORATION

2.2
System Clock Controller
STOP pin
XOUT pin
STOP mode started
by the program.
NORMAL
operation
Note 1: When the STOP mode is released, the start is made after the prescaler and the divider of the tim-
Note 2: STOP mode can also be released by inputting low level on the RESET pin, which immediately
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 time
STOP mode is released by the following sequence.
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-fre-
2. A warm-up period is inserted to allow oscillation time to stabilize. During warm up, all inter-
3. When the warm-up time has elapsed, normal operation resumes with the instruction follow-
quency clock oscillators are turned on; when returning to SLOW1 mode, only the low-fre-
quency clock oscillator is turned on. In the single-clock mode, only the high-frequency
clock oscillator is turned on.
nal 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.
ing 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 RESET pin input must also be “H” level, rising together with the power supply volt-
age. In this case, if an external time constant circuit has been connected, the RESET pin in-
put 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 RESET pin drops below the non-in-
verting high-level input voltage (Hysteresis input).
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.
WUT
00
01
10
11
Figure 2-8 Edge-sensitive Release Mode
operation
Return to NORMAL Mode
STOP
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.
Return to SLOW Mode
NORMAL
operation
5.85
1.95
750
250
operation
STOP
TMP86FH09AMG