PT6552LQ PTC [Princeton Technology Corp], PT6552LQ Datasheet - Page 4

• Manufacturer Part Number: PT6552LQ
• Manufacturer: PTC [Princeton Technology Corp]

SG1/P1 to SG4/P4
PIN CONFIGURATIONS
V1.3
SG5 to SG43
KS3 to KS6
KS1/SG44,
KS2/SG45,
Pin Name
KI1 to KI5
COM1
COM2
/RES
OSC
CLK
V
V
DO
CE
DI
SS
DD
I/O
I/O
O
O
O
O
I
-
I
-
I
I
I
Segment outputs: Used to output the display data that is
transmitted over the serial data input. Pins SG1/P1 to
SG4/P2 can be used as general-purpose outputs
according to control data specification.
Common driver outputs.
The frame frequency fo is (fosc/512)Hz
Key scan outputs. When a key matrix is formed,
normally a diode will be attached to the key scan timing
line to prevent shorts. However, since the output
transistor impedance is an unbalanced CMOS output, it
will not be damaged if shorted. Pins KS1/SG44 and
KS2/SG45 can be used as segment outputs according
to control data specification.
Oscillator connection: Oscillator circuit can be formed by
connecting the pin to a resistor and a capacitor
Power supply ground connected. Must be connected to
GND.
Reset input that re-initializes the LSI internal states.
During a reset, the display segments are turned off
forcibly regardless of the internal display data. All
internal key data is reset to low and the key scan
operation is disabled. However, serial data can input
during a reset.
Power supply connection. A supply voltage of between
4.5 and 6.0V must be provided.
Serial data interface:
Connected to the controller.
Since DO is an open-drain
output, it required a pull-up
resistor.
Key scan inputs: Pin with a built-in pull-down resistor.
Function
4
CE: Chip enable
CLK: Synchronization
clock
DI: Transfer data
DO: Output data
Active
H
H
L
-
-
-
-
-
-
-
-
Handing when
unused
Open
Open
Open
Open
GND
GND
GND
V
-
-
DD
PT6552
July 2010
48 to 51
52 to 56
Pin No.
5 to 43
1 to 4
44
45
46
47
57
58
59
60
61
62
63
64