PT6311是萤光显示幕（Vavuum Fluorescent Display)的控制/驱动IC，与NEC的uPD16311脚对脚兼容，，能够以1/8~1/16的工作周期驱动萤光显示幕。它内含12个区段输出脚位、8个栅(Grid)输出脚8段栅极输出脚位，足供一般应用之所需。此外PT6311采用三线输入式串列控制介面，相容性高上一且易设计，适合选为单晶片微处理器周边的面板控制、显示器驱动等用途。

特性：

1、多种显示模式（12段/16位~20段/8)

2、控制键扫描（12*4）

3、8级亮度调节电路

4、高电压输出

5、备用5个LED显示LED（20mA Max)

6、通用输入串行接口

7、无需外接驱动电阻

DESCRIPTION 文档资料
PT6311 is a Vacuum Fluorescent Display (VFD) Controller driven on a 1/8 to 1/16 duty factor housed in
52-pin plastic QFP Package. Twelve segment output lines, 8 grid output lines, 8 segment/grid output
drive lines, one display memory, control circuit, key scan circuit are all incorporated into a single chip to
build a highly reliable peripheral device for a single chip micro computer. Serial data is fed to PT6311
via a three-line serial interface.
 
FEATURES
• CMOS Technology
•  Low Power Consumption
•  Key Scanning (12 x 4 matrix)
•  Multiple Display Modes: (12 segments, 16 digits to 20 segments, 8 digits)
•  8-Step Dimming Circuitry
•  LED Ports Provide (5 channels, 20mA max.)
•  4- Bits General Purpose Input Ports Provided
•  Serial Interface for Clock, Data Input, Data Output, Strobe Pins
•  No External Resistors Needed for Driver Outputs 
•  Available in 52pins QFP and LQFP
 
APPLICATION
•  Microcomputer Peripheral Devices

COMMAND 1: DISPLAY MODE SETTING COMMANDS
PT6311 provides 8 display mode settings as shown in the diagram below: As stated earlier a command
is the first one byte (b0 to b7) transmitted to PT6311 via the DIN Pin when STB is “LOW”. However, for
these commands, the bits 5 to 6 (b4 to b5) are ignored, bits 7 & 8 (b6 to b7) are given a value of “0”.
 
The Display Mode Setting Commands determine the number of segments and grids to be used (1/8 to
1/16 duty, 20 to 12 segments). When these commands are executed, the display is forcibly turned off,
the key scanning stops. A display command “ON” must be executed in order to resume display. If the
same mode setting is selected, no command execution is take place, therefore, nothing happens.
 
When Power is turned “ON”, the 16-digit, 12-segment modes is selected.
 
 
MSB         LSB
   0  0  -  -  b3 b2 b1 b0 
 
 
                       Not Relevant  Display Mode Settings:
       0XXX: 8 digits, 20 segments
1000: 9 digits, 19 segments
       1001: 10 digits, 18 segments
       1010: 11 digits, 17 segments
       1011: 12 digits, 16 segments
       1100: 13 digits, 15 segments
       1101: 14 digits, 14 segments
       1110: 15 digits, 13 segments
       1111: 16 digits, 12 segments