tmp89fm42a TOSHIBA Semiconductor CORPORATION, tmp89fm42a Datasheet - Page 93

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

4.3
Function
RA000
Table 4-1 External Interrupts
4.3.1
4.3.2
Source
INT0
INT1
INT2
INT3
INT4
INT5
Note 1: fcgck, Gear clock [Hz]; fs, low frequency clock [Hz]; fspl, Sampling interval [Hz]
when they are not used.
power. Note that this makes external interrupts unavailable. Setting POFFCR3<INTxEN> to "1" supplies (ena-
bles) the basic clock for external interrupts and makes external interrupts available.
the external interrupt function for the first time, be sure to set POFFCR3<INTxEN> to "1" in the initial setting
of software (before operating the external interrupt control registers).
more are recognized as signals.
as signals.
Low power consumption function
External interrupt 0
External interrupts have a function that saves power by using the low power consumption register (POFFCR3)
Setting POFFCR3<INTxEN> to "0" stops (disables) the basic clock for external interrupts and helps save
After reset, POFFCR3<INTxEN> is initialized to "0" and external interrupts become unavailable. When using
External interrupt 0 detects the falling edge of the INT0 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
INT0
INT1
INT2
INT3
INT4
INT5
Pin
Note:Interrupt request signals may be generated when INTxEN is changed. Before changing INTxEN, clear
the corresponding interrupt enable register to "0" to disable the generation of interrupt. When the oper-
ation 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.
IMF AND EF16 = 1 Falling edge
IMF AND EF17 = 1
IMF AND EF18 = 1
IMF AND EF19 = 1
IMF AND EF20 = 1
IMF AND EF8 = 1
Enable conditions
Interrupt request sig-
Falling edge
Rising edge
Both edges
Falling edge
Rising edge
Both edges
Falling edge
Rising edge
Both edges
Falling edge
Rising edge
Both edges
"H" level
Falling edge
nal generated at
Page 74
Less than 1/fcgck: Noise
More than 1/fcgck and less than 2/fcgck:
Indeterminate
More than 2/fcgck: Signal
Less than 2/fspl: Noise
More than 2/fspl and less than 3/fspl+1/
fcgck: Indeterminate
More than 3/fspl+1/fcgck: Signal
Less than 2/fspl: Noise
More than 2/fspl and less than 3/fspl+1/
fcgck: Indeterminate
More than 3/fspl+1/fcgck: Signal
Less than 2/fspl: Noise
More than 2/fspl and less than 3/fspl+1/
fcgck: Indeterminate
More than 3/fspl+1/fcgck: Signal
Less than 2/fspl: Noise
More than 2/fspl and less than 3/fspl+1/
fcgck: Indeterminate
More than 3/fspl+1/fcgck: Signal
Less than 1/fcgck: Noise
More than 1/fcgck and less than 2/fcgck:
Indeterminate
More than 2/fcgck: Signal
NORMAL1/2, IDLE1/2
External interrupt pin input signal width and noise removal
Less than 4/fs: Noise
More than 4/fs and less than 8/fs: Inde-
terminate
More than 8/fs: Signal
Less than 4/fs: Noise
More than 4/fs and less than 8/fs: Inde-
terminate
More than 8/fs: Signal
Less than 4/fs: Noise
More than 4/fs and less than 8/fs: Inde-
terminate
More than 8/fs: Signal
Less than 4/fs: Noise
More than 4/fs and less than 8/fs: Inde-
terminate
More than 8/fs: Signal
Less than 4/fs: Noise
More than 4/fs and less than 8/fs: Inde-
terminate
More than 8/fs: Signal
Less than 4/fs: Noise
More than 4/fs and less than 8/fs: Inde-
terminate
More than 8/fs: Signal
SLOW1/2, SLEEP1
TMP89FM42A