HD66724 Datasheet, PDF (18/117 Pages) Hitachi Semiconductor – (Graphics LCD Controller/Driver with Key Scan Function)

HD66724/HD66725
Table 2 Pin Functional Description (cont)
Signals
VLOUT
Number of
Pins
I/O
4
O
C1+, C1– 10
—
C2+, C2– 8
—
RESET* 2
I
OPOFF 1
I
VccDUM 1
O
GNDDUM 1
O
TEST
1
I
VTEST1– 3
—
VTEST3
Connected to Functions
V_LCD pin/booster Potential difference between Vci and GND is boosted
capacitance twice or three times and then output. Magnitude of
boost is selected by instruction.
Booster
capacitance
External capacitance should be connected here when
using the double or triple booster.
Booster
capacitance
External capacitance should be connected here when
using the triple booster. Must be left disconnected
only when using the double booster.
MPU or external Reset pin. Initializes the LSI when low.
R-C circuit
Must reset after power-on.
V_CC or GND
Turns the internal operational amplifier off when
OPOFF = V_CC, and turns it on when OPOFF = GND.
If the amplifier is turned off (OPOFF = V_CC), V1 to V5
must be supplied to the V1OUT to V5OUT pins.
Input pins
Input pins
Outputs the internal V_CC level; shorting this pin sets
the adjacent input pin to the V_CC level.
Outputs the internal GND level; shorting this pin sets
the adjacent input pin to the GND level.
GND
Test pin. Must be fixed at GND level.
—
Test pins. Must be left disconnected.
18