PT6314_10 Datasheet, PDF (6/42 Pages) Princeton Technology Corp – Dot Character VFD Controller/Driver IC

PT6314
4. PIN DESCRIPTION
Pin Name
VDD2
VSS2
I/O
- VFD Driving Power Supply Pin
- VFD Driving Power Supply Pin
Description
Pin No.
1, 36
2, 35
VDD1
- Logic Power Supply Pin
3
CLK
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 initialized. The Segment
7
and Grid Outputs are fixed to VDD.
TEST
DLS
DS1, DS0
R/W(/WR)
Test Pin
I 0 or floating : the Normal Operation Mode
8
1:the Test Mode is active
Display Line Select Pin
I
This pin is used to select the number of display lines when the Power is ON, Reset or
Resetting.
9
0: 1 line is selected (N=”0”)* 1: 2 lines are selected (N=”1”)*
I
Duty Select Pin
These pins set the duty ratio. The duty ratio is determined by the number of Grid.
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.
I
0: Write Function 1: Read Function
Under the i80 parallel data Transfer Mode (/WR), thispin is Write Enable Pin. It writes data at
12
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
E(/RD)/SCK
SI/SO
DB0 to DB7
IFSEL
MCU
Register Select/Strobe Pin
I
Under the Parallel Transfer Mode is selected, this pin acts as the Register Select Pin.
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.
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 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.
Serial Input/Output Pin
I/O Under the Serial Data Transfer Mode, this pin functions as an I/O Pin.
Under the Parallel Data Transfer Mode, this pin may be connected to either “H” or “L”
Parallel Data Input/Output Pins
I/O Under the Parallel Data Transfer Mode, these pins are used as I/O Pin.
Under the 4-bit Transfer Mode, DB4 to DB7 are used.
I/F Select Pin
I This pin is used to select the I/F mode: Serial or Parallel Transfer
0: Serial Data Transfer 1: Parallel Data Transfer
Interface Select Pin
I This pin is used to select the interface mode: i80 or M68.
0: i80 CPU Mode 1: M68 CPU Mode
13
14
15
16-23
24
25
/CS
I
Chip Select Pin
When this pin is set to “L” the PT6314 is active.
26
V1.5
6
October 2009