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TC9328AF Datasheet(PDF) 7 Page - Toshiba Semiconductor

No. de pieza TC9328AF
Descripción Electrónicos  Portable Audio DTS Controller (DTS-21)
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Fabricante Electrónico  TOSHIBA [Toshiba Semiconductor]
Página de inicio  http://www.semicon.toshiba.co.jp/eng
Logo TOSHIBA - Toshiba Semiconductor

TC9328AF Datasheet(HTML) 7 Page - Toshiba Semiconductor

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TC9328AF
2004-09-13
7
Pin No.
Symbol
Pin Name
Function and Operation
Remarks
42
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.
43
44
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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