PT6314 Datasheet, PDF (4/49 Pages) Texas Instruments – 3 Amp Adjustable Positive Step-down Integrated Switching Regulators

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Dot Character VFD Controller/Driver IC
PT6314
PIN DESCRIPTION
Pin Name I/O
Description
Pin No.
VDD2
- VFD Driving Power Supply Pin
1, 36
VSS2
- VFD Driving Power Supply Pin
2, 35
VDD1
- Logic Power Supply Pin
3
OSCO O Oscillation Signal Output Pin
4
OSC2
O Oscillation Output Pin
5
OSC1
I Oscillation Input Pin
6
Reset Pin
/RESET I When this pin is set to “0”, all internal registers and commands are
7
initialized. The Segment and Grid Outputs are fixed to VDD.
TEST
DLS
DS1, DS0
Test Pin
I 0 or floating : the Normal Operation Mode
1:the Test Mode is active
Display Line Select Pin
I
This pin is used to select the number of display lines when
Power is ON, Reset or Resetting.
the
0: 1 line is selected (N=”0”)* 1: 2 lines are selected (N=”1”)*
Duty Select Pin
I These pins set the duty ratio. The duty ratio is determined by the
number of Grid.
8
9
10, 11
Read/Write (Write) Signal Pin
Under the M68 Parallel Data Transfer Mode (R/W), this pin functions as
the Data Transfer Select Pin.
R/W(/WR)
I
0: Write Function 1: Read Function
Under the i80 parallel data Transfer Mode (/WR), this pin is Write
12
Enable Pin. It writes data at the rising edge of this signal.
Under the Serial Transfer Mode, the Read or Write function is selected
by instruction and this pin is connect to either “H” or “L”.
RS/STB
Register Select/Strobe Pin
Under the Parallel Transfer Mode is selected, this pin acts as the
I Register Select Pin.
13
0:Instruction Register (IR) 1: Data register (DR)
Under Serial Data Transfer Mode, this pin acts as the Strobe Input Pin.
Enable (Read)/Shift Clock
Under the M68 Parallel Data Transfer Mode (E), this pin functions as
the Write Enable Pin. Data is written at the falling edge.
E(/RD)/SCK
I
Under the i80 Parallel Data Transfer Mode (/RD), this pin functions as
the Read Enable Pin. When this pin is set to “LOW”, data is outputted to
14
the Data Bus.
Under the Serial Data Transfer Mode, this pin functions as the Shift
Clock Input Pin. Data is written at the rising edge.
Note: *=N is the Display Line Select Flag in “Function Set” Command
PT6314 V1.3
-4-
March, 2006