hd66740 Renesas Electronics Corporation., hd66740 Datasheet - Page 10

• Manufacturer Part Number: hd66740
• Description: 112 X 80-dot Graphics Lcd Controller/driver - Hitachi Semiconductor
• Manufacturer: Renesas Electronics Corporation.

HD66740
Table 2
Signals
DB0–DB7
COM1/80–
COM80/1
SEG1/112–
SEG112/1
V1OUT–V5
OUT
V
V
OSC1,
OSC2
Vci
VLOUT
LCD
CC
, GND
Number of
Pins
8
80
112
5
3
12
2
5
3
Pin Functional Description (cont)
I/O
I/O or
I
O
O
I or O Open or
—
—
I or O Oscillation-
I
O
Connected to
MPU
LCD
LCD
external
bleeder-resistor
Power supply
Power supply
resistor or clock
Power supply
V
capacitance
LCD
pin/booster
10
Functions
Serves as a bidirectional data bus for a parallel bus
interface.
For a 4-bit bus, data transfer uses DB7-DB4
Must be fixed at GND level when serial interface mode
is used.
Common output signals for graphics display: COM1 to
COM8 for the first line, COM9 to COM16 for the
second line, COM17 to COM24 for the third line,
COM25 to COM32 for the fourth line, and COM73 to
COM80 for the 10th line. All the unused pins output
unselected waveforms. In the sleep mode (SLP = 1) or
standby mode (STB = 1), all pins output GND level.
The CMS bit can change the shift direction of the
common signal. For example, if CMS = 0, COM1/80 is
COM1. If CMS = 1, COM1/80 is COM80.
Note that the start position of the common output (the
first line) is shifted by CN1–CN0 bits.
Segment output signals for graphics display. In the
sleep mode (SLP = 1) or standby mode (STB = 1), all
pins output GND level.
The SGS bit can change the shift direction of the
segment signal. For example, if SGS = 0, SEG1/112 is
SEG1. If SGS = 1, SEG1/112 is SEG112.
Used for output from the internal operational amplifiers
when they are used (OPOFF = GND); attach a
capacitor to stabilize the output. When the amplifiers
are not used (OPOFF = V
supplied to these pins externally.
Power supply for LCD drive. V
V
For R-C oscillation using an external resistor, connect
an external resistor.
clock pulses to OSC1.
Inputs a reference voltage and supplies power to the
booster; generates the liquid crystal display drive
voltage from the operating voltage.
output voltage must not be larger than the absolute
maximum ratings.
Must be left disconnected when the booster is not
used.
Potential difference between Vci and GND is triple- to
five-times-boosted and then output.
boost is selected by instruction.
CC
: +1.8 V to +3.6 V; GND (logic): 0 V
For external clock supply, input
CC
), V1 to V5 voltages can be
LCD
– GND = 15 V max.
The boosting
Magnitude of