PT6314 datasheet(6/42 Pages) PTC

6 / 42 page

PT6314

V1.5

October 2009

4. 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

CLK

Oscillation Signal Output Pin

OSC2

Oscillation Output Pin

OSC1

Oscillation Input Pin

/RESET

Reset Pin

When this pin is set to “0”, all internal registers and commands are initialized. The Segment

and Grid Outputs are fixed to VDD.

TEST

Test Pin

0 or floating : the Normal Operation Mode

1:the Test Mode is active

DLS

Display Line Select Pin

This pin is used to select the number of display lines when the Power is ON, Reset or

Resetting.

0: 1 line is selected (N=”0”)* 1: 2 lines are selected (N=”1”)*

DS1, DS0

Duty Select Pin

These pins set the duty ratio. The duty ratio is determined by the number of Grid.

10, 11

R/W(/WR)

Read/Write (Write) Signal Pin

Under the M68 Parallel Data Transfer Mode (R/W), this pin functions as the Data Transfer

Select Pin.

0: Write Function

1: Read Function

Under the i80 parallel data Transfer Mode (/WR), thispin is Write 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

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.

E(/RD)/SCK

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.

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.

SI/SO

I/O

Serial Input/Output Pin

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”

DB0 to DB7

I/O

Parallel Data Input/Output Pins

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.

16-23

IFSEL

I/F Select Pin

This pin is used to select the I/F mode: Serial or Parallel Transfer

0: Serial Data Transfer

1: Parallel Data Transfer

MCU

Interface Select Pin

This pin is used to select the interface mode: i80 or M68.

0: i80 CPU Mode

1: M68 CPU Mode

/CS

Chip Select Pin

When this pin is set to “L” the PT6314 is active.

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