PT6311是螢光顯示幕（Vavuum Fluorescent Display)的控制/驅(qū)動(dòng)IC，與NEC的uPD16311腳對腳兼容，，能夠以1/8~1/16的工作周期驅(qū)動(dòng)螢光顯示幕。它內(nèi)含12個(gè)區(qū)段輸出腳位、8個(gè)柵(Grid)輸出腳8段柵極輸出腳位，足供一般應(yīng)用之所需。此外PT6311采用三線輸入式串列控制介面，相容性高上一且易設(shè)計(jì)，適合選為單晶片微處理器周邊的面板控制、顯示器驅(qū)動(dòng)等用途。
特性：
1、多種顯示模式（12段/16位~20段/8)
2、控制鍵掃描（12*4）
3、8級亮度調(diào)節(jié)電路
4、高電壓輸出
5、備用5個(gè)LED顯示LED（20mA Max)
6、通用輸入串行接口
7、無需外接驅(qū)動(dòng)電阻
DESCRIPTION 文檔資料
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
