tmp89fm42a TOSHIBA Semiconductor CORPORATION, tmp89fm42a Datasheet - Page 97

• Manufacturer Part Number: tmp89fm42a
• Description: 8 Bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

4.3
Function
RA000
4.3.5
more are recognized as signals.
as signals.
External interrupt 5
External interrupt 5 detects the falling edge of the INT5 pin and generates interrupt request signals.
In NORMAL1/2 or IDLE1/2 mode, pulses of less than 1/fcgck are removed as noise and pulses of 2/fcgck or
In SLOW/SLEEP mode, pulses of less than 4/fs are removed as noise and pulses of 8/fs or more are recognized
level is detected twice consecutively, the signal is recognized as a signal.
interrupts are unavailable. When operation returns to NORMAL1/2, IDLE1/2, SLOW1/2 or SLEEP1 mode,
sampling operation restarts.
Note 1: When noise is input consecutively during sampling external interrupt pins, the noise cancel function does
Note 2: When an external interrupt pin is used as an output port, the input signal to the port is fixed to "L" when
Note 3: Interrupt requests may be generated during transition of the operation mode. Before changing the op-
In SLOW1/2 or SLEEP1 mode, a signal is sampled by the low frequency clock divided by 4. If the same
In IDLE0, SLEEP0 or STOP mode, the noise canceller sampling operation is stopped and an external
Signal after noise removal
not work properly. Set EINTCRx<INTxNC> according to the cycle of externally input noise.
the mode is switched to the output mode, and thus an interrupt request occurs. To use the pin as an
output port, clear the corresponding interrupt enable register to "0" to disable the generation of interrupt.
eration mode, clear the corresponding interrupt enable register to "0" to disable the generation of
interrupt. When the operation mode is changed from NORMAL1/2 or IDLE1/2 to SLOW1/2 or SLEEP1,
wait 12/fs [s] after the operation mode is changed and clear the interrupt latch. And when the operation
mode is changed from SLOW1/2 or SLEEP1 to NORMAL1/2 or IDLE1/2, wait 2/fcgck+3/fspl [s] after the
operation mode is changed and clear the interrupt latch.
INT4 pin
Figure 4-7 Noise Cancel Operation
Page 78
Signal
Noise
TMP89FM42A