HD44780U 查看數據表（PDF） - Hitachi -> Renesas Electronics

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HD44780U

Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver with Key Scan Function

Hitachi -> Renesas Electronics 

HD66727

Electrical Characteristics Notes

1. All voltage values are referred to GND = 0V. If the LSI is used above the absolute maximum ratings, it

may become permanently damaged. Using the LSI within the given electrical characteristic is strongly

recommended to ensure normal operation. If these electrical characteristic are exceeded, the LSI may

malfunction or exhibit poor reliability.

2. VCC > V1 ≥ V2 ≥ V3 ≥ V4 ≥ V5 > VEE must be maintained.

3. For bare die products, specified at 75°C.

4. For bare die products, specified by the common die shipment specification.

5. The following four circuits are I/O pin configurations except for liquid crystal display output (Figure

51).

Pins: SCL, ID1/CS*, ID0,

OSC1, OPOFF, IM,

EXM, TEST

VCC

PMOS

NMOS

Pins: KIN3 to KIN0, RESET*

Pins: KST7 to KST0, IRQ*

LED2 to LED0, PORT2 to PORT0

VCC

VCC

PMOS

PMOS

VCC

PMOS

(Pull-up MOS)

NMOS

NMOS

GND

VCC

Pin: SDA

(Pull-up MOS)

PMOS

GND

VCC

GND

PMOS

(Input circuit)

NMOS

VCC (Tri-state output circuit)

PMOS

Output enable

Output data

NMOS

GND

IM

Figure 51 I/O Pin Configurations

6. The TEST pin must be grounded and the ID1 and ID0, IM, EXM, and OPOFF pins must be grounded or

connected to VCC.

7. Corresponds to the high output for clock-synchronized serial interface.

91

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