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TC94A09F датащи(PDF) 11 Page - Toshiba Semiconductor

номер детали TC94A09F
подробное описание детали  Single-Chip CD Processor with Built-in Controller
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производитель  TOSHIBA [Toshiba Semiconductor]
домашняя страница  http://www.semicon.toshiba.co.jp/eng
Logo TOSHIBA - Toshiba Semiconductor

TC94A09F датащи(HTML) 11 Page - Toshiba Semiconductor

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TC94A09F
2001-10-15
11
Pin
Number
Symbol
Pin Name
Function and Operation
Remarks
91
HOLD
Hold mode control
input
Input pin used to request or release hold state.
Normally, the pin is used for inputting the CD
mode selection signal or battery detection
signal.
Halt states are Clock Stop mode (crystal
oscillator stops oscillation) and Wait mode
(CPU stops). The modes are entered using the
CKSTP and WAIT instructions.
By program, Clock Stop mode can be entered
by detection of Low level on the HOLD pin or
by forced execution. Clock Stop mode can be
released by detection of High level on the
HOLD
pin or change in the HOLD pin input.
Executing the CKSTP instruction stops the
clock generator and the CPU, entering memory
backup state. During memory backup state,
current dissipation becomes low (1
mA or
below). The display output and CMOS output
port automatically become Low level. The
N-channel open drain output becomes off.
Regardless of the HOLD pin input state, Wait
mode is executed and current dissipation
becomes low. Crystal oscillator only on or CPU
operation suspended can be programmed.
When the crystal oscillator only is on, all
displays are at Low level. The other pins are in
hold state. When CPU operation is suspended,
all states are held except that the CPU is
suspended. Wait mode is released by a change
of the HOLD pin input.
(Note) For Backup mode, use the oscillator
connected to the MXO and MXI pins.
Turn off the VDD pin (power supply for
CD), and enter Backup mode.
92
INTR
External interrupt
input
External interrupt input pin.
When interrupts are enabled and a pulse of
1.11 to 3.33
ms or more (13.3 to 40 ms when the
75 kHz clock is used) is input to this pin, an
interrupt is generated and the program jumps to
address 1. Input logic and rising/falling edge
can be individually selected for interrupt inputs.
The internal 8-bit timer clock can be selected
for interrupt inputs. Interrupts can be generated
(address 3) by pulse count or the count value.
Interrupt inputs are Schmidt inputs. The pin can
be used as an input port for inputs such as
remote control signals.
MVDD


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