TC9328AF datasheet(7/84 Pages) TOSHIBA

7 / 84 page

TC9328AF

2004-09-13

Pin No.

Symbol

Pin Name

Function and Operation

Remarks

HOLD

Hold mode control

input

Input pin for request/release hold mode.

Normally, this pin is used to input radio

mode selection signals or battery

detection signals.

Hold mode includes CLOCK STOP

mode (stops crystal oscillation) and

WAIT mode (halts CPU). Setting is

implemented with the CKSTP

instruction or the WAIT instruction.

To request Clock Stop mode, either

L-level detection on the

HOLD pin or

forced execution can be programmed.

The mode is released by H-level

detection on the HOLD pin or input

change, respectively. Executing the

CKSTP instruction stops the clock

generator and the CPU, entering

memory backup state. In memory

backup state, current dissipation

becomes low (1

µA or less) and the

display output/CMOS output ports

automatically become L level and N-ch

open drain output Off.

Regardless of this input state, Wait

mode is executed in order to lower

power dissipation. Either crystal

oscillator only in operation or CPU

suspension can be programmed. For

crystal oscillator only in operation, all

displays are at L level and other pins

are in hold state. For CPU suspension,

the CPU stops and all others retain

their states. Wait mode is released by

changing HOLD input.

INTR1

INTR2

/PCTRin

External interrupt

input

/Pulse counter

input

External interrupt input pins.

When interrupts are enabled and a 13.3

to 26.7 ms pulse or longer is input to

the pin, interrupt INTR1/2 is generated

and the program jumps to address 1/2.

Input logic or rising/falling edge can be

selected for each input interrupt.

The internal 8-bit timer clock input can

be selected as input to the pins. When

the count value reaches the specified

value, an interrupt is generated

(address 3).

The pin is also used for input of an 8-bit

pulse counter. Input rising/falling or

upcount/downcount can be selected for

the counter.

These inputs use built-in Schmitt

circuits. The pins can also be used as

input ports for input of remote control

signals or a tape count.

VDD

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