TMP88CS42FG datasheet(45/216 Pages) TOSHIBA

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Page 35

TMP88CS42FG

3.5 External Interrupts

The TMP88CS42FG has 6 external interrupt inputs. These inputs are equipped with digital noise reject circuits

(Pulse inputs of less than a certain time are eliminated as noise).

Edge selection is also possible with INT1 to INT4. The INT0/P10 pin can be configured as either an external inter-

rupt input pin or an input/output port, and is configured as an input port during reset.

Edge selection, and noise reject control and INT0/P10 pin function selection are performed by the external inter-

rupt control register (EINTCR).

Note 1: In NORMAL or IDLE mode, if a signal with no noise is input on an external interrupt pin, it takes a maximum of "signal

establishment time" from the input signal's edge to set the interrupt latch.

(1) INT1 pin

49/fc [s] ( at EINTCR<INT1NC> = "1") , 193/fc [s] ( at EINTCR<INT1NC> = "0")

(2) INT2 to INT4 pins

25/fc [s]

Note 2: When EINTCR<INT0EN> = "0", IL3 is not set even if a falling edge is detected on the INT0 pin input.

Note 3: When a pin with more than one function is used as an output and a change occurs in data or input/output status, an inter-

rupt request signal is generated in a pseudo manner. In this case, it is necessary to perform appropriate processing such

as disabling the interrupt enable flag.

Source

Sub-Pin

Enable Conditions

Release Edge (level)

Digital Noise Reject

INT0

P10

IMF EF3 INT0EN=1

Falling edge

Pulses of less than 2/fc [s] are eliminated as

noise. Pulses of 6/fc [s] or more are considered

to be signals. (at CGCR<DV1CK>=0).

INT1

P11

IMF EF5 = 1

Falling edge

Rising edge

Pulses of less than 15/fc or 63/fc [s] are elimi-

nated as noise. Pulses of 48/fc or 192/fc [s] or

more are considered to be signals.

(at CGCR<DV1CK>=0).

INT2

P12/TC1

IMF EF29 = 1

Pulses of less than 7/fc [s] are eliminated as

noise. Pulses of 24/fc [s] or more are considered

to be signals.(at CGCR<DV1CK>=0).

INT3

P21/TC3

IMF EF30 = 1

INT4

P22/TC4

IMF EF31 = 1

INT5

P20/STOP

IMF EF15 = 1

Falling edge

Pulses of less than 2/fc [s] are eliminated as

noise. Pulses of 6/fc [s] or more are considered

to be signals.

TMP88CS42FG Datasheet(PDF) 45 Page - Toshiba Semiconductor

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