HD404818 Datasheet, PDF (9/100 Pages) Hitachi Semiconductor – 16-digit LCD driver

HD404818 Series
Pin Functions
Power Supply
V_CC: Apply the V_CC power supply voltage to this pin.
GND: Connect to ground.
TEST: For test purposes only. Connect it to V_CC.
RESET: MCU reset pin. Refer to the Reset section for details.
NUMG: Non-user pin. Connect it to GND.
NUMO: Non-user pin. Do not connect it to any lines.
Oscillators
OSC₁, OSC₂: Internal oscillator input pins. They both can be connected to a crystal, ceramic resonator, or
external oscillator circuit. Refer to the Internal Oscillator Circuit section for details.
X1, X2: Watch oscillator 32-kHz crystal pins.
Ports
D₀–D₁₃ (D Port): Fourteen 1-bit I/O ports. D₀ to D₉ are I/O ports and D₁₀ to D₁₃ are input ports. D₀–D₉ are
high current output ports (15 mA max.). D₁₁–D₁₃ are also available as voltage comparators. Refer to the
Input/Output section for details.
R0–R3 (R Ports): 4-bit I/O ports. R0₀, R0₁, R0₂, R3₁, R3₂, and R3₃ are multiplexed with SCK, SI, SO,
TIMO, INT₀, and INT₁, respectively.
Interrupts
INT₀, INT₁: External interrupt pins. INT₁ can be used as an external event input pin for timer B. INT₀ and
INT₁ are multiplexed with R3₂ and R3₃, respectively. For details, see the Interrupts section.
Serial Interface
SCK, SI, SO: The transmit clock I/O pin (SCK), serial data input pin (SI), and serial data output pin (SO)
are used for serial interface. SCK, SI, and SO are multiplexed with R0₀, R0₁, and R0₂, respectively. For
details, see the Serial Interface section.
Timer
TIMO: Variable duty-cycle pulse waveform output pin. See the Timer C section for details.
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