STFPC311 Front panel controller/driver with standby power management Datasheet not recommended for new design Features IC front panel controller/driver Timing power standby management controller IC power supply from 3.3V (V ) to 30V (V ) DD SS PQFP-52 Integrated VFD driver and controller Infrared (IR) Remote Control (RC) Decoder Description (Philips or NEC format) The STFPC311 is a complete, low-cost, Drives many display modes (12 segments/16 integrated solution for controlling and driving a digits to 20 segments/8 digits) front panel Vacuum Fluorescent Display (VFD). It High voltage outputs (V - 33.3V max) DD is ideal for decreasing power consumption in standby mode by reducing the application standby No external resistors necessary for driver current to a minimum. It also contains a built-in outputs (P-channel open-drain with pull-down remote control decoder module. resistor outputs) Key scanning (up to 12mm x 2mm matrix) While in standby mode of operation, a valid key press or signal from the infrared decoder will start LED ports (4 channels, 20mA, max) a proper power-up (see Figure 6 on page 13). Serial interface (STB, CLK, D , and D ) IN OUT The STFPC311 integrates a VFD controller with a communication protocol driver that is run on a 1/8 to 1/16-duty factor. It Dimming circuit (adjustable up to 8 steps) consists of 12 segment output lines, 8 grid output Supports auto-increment of display digit, which lines, 8 shared segments/grid output drive lines, a lightens the load on the MCU display memory, a control circuit, and a key scan circuit. Serial data is input to the STFPC311 Programmable 8 hot keys for the IR remote through the SPI interface of a microcontroller control command (STB, D , D , and CLK). IN OUT Programmable 8 hot keys for key scan Additionally, this IC can support two general- command purpose input switches (SW1 and SW2). Low power consumption in standby mode 2 general-purpose input ports (SW1, SW2) Applications Available in PQFP-52 package DVD players VCD players AV equipment like Home Stereo POS Systems Table 1. Device summary Part number Temperature range Package STFPC311 -40C to 85C PQFP-52 September 2012 Doc ID 12324 Rev 2 1/39 This is information on a product still in production but not recommended for new designs. www.st.com 39 Obsolete Product(s) - Obsolete Product(s)Contents STFPC311 Contents 1 Functional description . 4 1.1 Block diagram . 5 2 Pin connections . 6 2.1 Pin description 7 3 Initialization 8 3.1 Normal mode of operation . 8 3.2 Receive operation . 8 3.3 Transmit operation . 8 3.4 Standby or power-down mode 9 3.5 IR decoding 9 3.6 Watchdog timer . 9 3.6.1 Watchdog timer operation during power-up 10 3.6.2 Watchdog timer operation during power-down . 11 3.6.3 Watchdog timer operation during standby . 12 3.7 Flowcharts 13 4 Display RAM address and display mode . 16 5 Data 18 5.1 LED port 18 5.2 SW data 18 6 Commands 19 6.1 Configuration mode setting command . 19 6.2 Data setting command . 20 6.3 Address setting command 21 6.4 Display control and hotkey setting command 21 7 Programmable hotkeys 23 7.1 IR Remote control 23 7.2 Front panel keys 23 2/39 Doc ID 12324 Rev 2 Obsolete Product(s) - Obsolete Product(s)