TC9329FA データシートの表示（PDF） - Toshiba
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TC9329FA Datasheet PDF : 83 Pages
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Pin No. Symbol
Pin Name
54 RESET
Reset input
Function and Operation
Input pin for system reset signals.
RESET takes place while at low level;
at high level, the program starts from
address “0”.
Normally, if more than 0.9 V is supplied
to VDD when the voltage is 0, the
system is reset (power on reset).
Accordingly, this pin should be set to
high level during operation.
Note: When the power-on reset function
is disabled by the AI switch, input
L level at power on.
55 XOUT
56 XIN
Crystal oscillator
pin
Crystal oscillator pins.
A reference 75 kHz crystal resonator is
connected to the XIN and XOUT pins.
(Ci = Co = 10 pF)
The oscillator stops oscillating during
CKSTP instruction execution.
The VXT pin is the power supply for the
crystal oscillator. A stabilizing capacitor
(0.47 µF typ.) is connected.
TC9329FA/FB
Remarks
VDD
XOUT
ROUT
RfXT
VDD
XIN
58 VDB
59 C1
60 C2
61 VEE
62 C3
63 C4
64 VLCD
Voltage doubler
boosting output
pins
Voltage doubler boosting output pins.
The VDB pin doubles the VDD pin
voltage using the voltage doubler
boosting capacitor between C1 and C2.
The doubled voltage is used for the AD
converter and constant voltage circuit
(Vreg, VEE) power supply.
The VEE pin supplies a constant
voltage of 1.5 V from the VDB voltage.
The voltage is doubled (to 3 V) using
the voltage doubler boosting capacitor
between C3 and C4. The doubled
voltage is then supplied to the VLCD
pin. The VEE potential and the VLCD
potential are used to drive the LCD.
Connect a stabilizing capacitor between
the VDB pin and GND (0.1 µF, 10 µF
typ.), and between the VLCD pin and
GND (0.1 µF typ.). Connect a voltage
doubler boosting capacitor (0.1 µF typ.)
between C1 and C2, and between C3
and C4. (Note 1)
VLCD
Note 1: When the LCD pin is set as an output port, the “H” level output is the doubled voltage VLCD. Therefore,
disconnect the voltage doubler boosting capacitor but connect the VLCD pin to the VDD pin.
10
2002-02-07
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