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Pin No.
Symbol
77
X
OUT
Crystal oscillator pin
78
X
IN
79
V
XT
3 V constant-voltage
80
V
LCD
output pin
Note 2: When a device is reset (V
to input; the LCD output and I/O port common pins are set to LCD output, the I/O ports and common pins
with additional functions (eg, SIO, A/D converter) are set to I/O port input pins; the IF
Note 3: In PLL off mode (all 4 bits of the internal reference port are set to 1), IF
pulled down, and DO1 and DO2 are at high-impedance.
Note 4: In clock stop mode (during execution of the CKSTP instruction), output ports and LCD output pins are all set
to low. The constant-voltage circuit (V
Note 5: When a device is reset, the contents of output ports and internal ports are undefined. Therefore, initialize by
program as required.
Pin Name
Crystal oscillator pin.
A 75 kHz reference crystal oscillator is connected
to the X
and X
IN
Oscillation stops during execution of a CKSTP
instruction.
The V
pin is the power supply for the crystal
XT
oscillator. Connect a capacitor (0.47 F typ.) for
stabilization.
3 V constant-voltage output pin for driving the
LCDs.
Connect a capacitor (1.0 F typ.) for stabilization.
from 0 V to 1.8 V or more, or RESET from low to high), the I/O ports are set
DD
) and clock generator power supply (V
LCD
Function and Operation
pins.
OUT
IN
8
TC9314F
Remarks
pin is set to IF input.
IN
and the FM
and AM
pins are
IN
IN
) are turned off.
XT
2003-07-03
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