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TC94A39FAG датащи(PDF) 5 Page - Toshiba Semiconductor

номер детали TC94A39FAG
подробное описание детали  Single-Chip CD Processor with Built-in Controller (CD-DX)
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производитель  TOSHIBA [Toshiba Semiconductor]
домашняя страница  http://www.semicon.toshiba.co.jp/eng
Logo TOSHIBA - Toshiba Semiconductor

TC94A39FAG датащи(HTML) 5 Page - Toshiba Semiconductor

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TC94A39FAG/FB
2003-04-01
5
Pin Functions
Pin
No.
Symbol
Pin Name
Function and Operation
Remarks
49
RESET
Reset input
System reset input pin for the device.
A reset is applied while the RESET signal is low.
When it is high, the 16.9344-MHz crystal
oscillator (XI, XO) starts operating. The
controller counts clock pulses from this oscillator
and waits a specified standby time
(approximately 50 ms) before starting the
controller program from address 0. The CD
processor is placed in the standby state at this
time.
Normally, raising the voltage on MVDD from 0
to 1.8 V or higher triggers a system reset
(power-on reset) so that the RESET pin should
be held at high.
50
51
P8-0
/MXI
/OSC
(BRK1)
P8-1
/MXO
(BRK2)
I/O port 8-0
/crystal oscillator
/CR oscillator
I/O port 8-1
/crystal oscillator
2-bit CMOS I/O port.
Input/output can be specified for each bit. When
the pins are used as I/O port input, each pin can
be pulled up or down by program. When backup
release for clock stop mode or wait mode is
enabled for the pins, a change in a pin can
release the backup state.
The program can set these pins to be used for a
75-kHz or 32.768-kHz dedicated crystal
oscillator. The P8-0 pin can also be used for a
CR oscillator. These clocks are used for the
operation of the controller and peripheral
devices. Upon a system reset, the 16.9344-MHz
crystal oscillator (XI, XO) is selected as the
clock for controller and peripheral device
operation. The program can subsequently set
the pins to oscillator pins and switch the clock
generated from the oscillator to the controller
clock. When the pins are used for an oscillator,
executing the CKSTP instruction causes its
oscillation to stop.
(Note) When the P8-0 pin is used for a CR
oscillator, the P8-1 pin can used as an
I/O port pin.
(Note) Backup release is enabled for both pins
simultaneously.
(Note) Use a crystal oscillator having a good
startup characteristic.
(Note) Upon a system reset, the pins are set to
I/O port input.
(Note) After setting the pins to oscillator pins,
wait until oscillation settles before
switching the controller clock.
MXO
Rout2
RfXT2
MXI
MVDD
MVSS
(When used for crystal oscillator)
MVDD
R
MVDD
MVSS
OSC
C
(When P8-0 is used
for CR oscillator)
MVDD
MVDD
RIN1
MVDD
Input
instructio
MVSS
(When used for I/O port)
MVDD
MVSS


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