tmp89fm46a TOSHIBA Semiconductor CORPORATION, tmp89fm46a Datasheet - Page 56

• Manufacturer Part Number: tmp89fm46a
• Description: Tlcs-870/c1 Series
• Manufacturer: TOSHIBA Semiconductor CORPORATION

RA000
Figure 2-11 Edge-sensitive Release Mode (Example when the high-frequency clock oscillation
Note:
STOP pin
XOUT pin
If the rising edge is input to the STOP pin within 1 machine cycle after SYSCR1<STOP> is set to "1", the STOP
mode will not be released.
NORMAL mode
The STOP mode
is started
by the program.
(3)
The STOP mode is released in the following sequence:
Note:When the STOP mode is released with a low hold voltage, the following cautions must be ob-
STOP mode release operation
2. Release by the key-on wakeup
3. Release by the voltage detection circuits
1. Oscillation starts. For the oscillation start operation in each mode, refer to "Table 2-6 Oscil-
2. Warm-up is executed to secure the time required to stabilize oscillation. The internal operations
3. After the warm-up time has elapsed, the normal operation is restarted by the instruction that
served.
The supply voltage must be at the operating voltage level before releasing the STOP mode. The
RESET pin input must also be "H" level, rising together with the supply voltage. In this case, if
an external time constant circuit has been connected, the RESET 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 the input voltage level of the RESET pin drops below the non-inverting high-level input
voltage (Hysteresis input).
a voltage detection reset signal", the STOP mode is released and a reset is applied as soon as
the supply voltage becomes lower than the detection voltage.
detection circuits, the reset is released and the warm-up starts. After the warm-up is completed,
the NORMAL1 mode becomes active.
lation Start Operation at Release of the STOP Mode".
remain stopped during warm-up. The warm-up time is set by the warm-up counter, depending
on the oscillator characteristics.
follows the STOP mode start instruction. At this time, the prescaler and the divider of the
timing generator are cleared to "0".
The STOP mode is released by inputting the prescribed level to the key-on wakeup pin.
The level to release the STOP mode can be selected from "H" and "L".
For release by the key-on wakeup, refer to section "Key-on Wakeup".
The STOP mode is released by the supply voltage detection by the voltage detection circuits.
If the voltage detection operation mode of the voltage detection circuits is set to "Generates
When the supply voltage becomes equal to or higher than the detection voltage of the voltage
For details, refer to the chapter on the voltage detection circuit.
Note: If the key-on wakeup pin input becomes the opposite level to the release level after the
Note: If the supply voltage becomes equal to or higher than the detection voltage within 1 ma-
STOP
warm-up starts, the STOP mode is not restarted.
chine cycle after SYSCR1<STOP> is set to "1", the STOP mode will not be released.
mode
circuit is selected)
Page 37
V IH
The STOP mode is released by the hardware
at the rising edge of the STOP pin input.
Warm-up
NORMAL
mode
STOP
TMP89FM46A
mode