Preliminary PT6992 Front Panel LED Control/Driver Power with Standby Management DESCRIPTION FEATURES The PT6992 is designed to integrate the LED driver, key-scan matrix, infrared (IR) remote control decoding and into one integrated solution. All functions are programmable using I2C interface. In standby operation, the PT6992 provides the standby power management to the chipset for low power consumption. The PT6992 is housed in 24-pin TSSOP package. Pin assignments and application circuit are optimized for easy PCB layout and cost saving advantages. • • • • • • • • APPLICATIONS • • • • VCR DVD Recorder Home Theater Set-top box and other application that require a compact, integrated solution • HTiB (Home Theater in a box) • Personal video recorders (PVRs) • • • • • IC front panel LED controller driver Standby power management to the host 5.0V (VDD) supply and 3.3V interface for the IC IR remote control decoder (Philips, NEC, Thomson, Sony, Matsushita) Multiple display modes ( 7 segments and 6 digits to 9 segments and 4 digits ) External resistors necessary for all logic outputs (N-CH. Open drain) Key scanning (up to 7 x 1 matrix = 7 keys) I2C serial interface (SCL, SDA) communication protocol Programmable hotkeys for IR remote control command Programmable hotkeys for KEYSCAN command Low power consumption in standby mode Dimming circuit (8 steps) Available in TSSOP-24 package BLOCK DIAGRAM STBY IR_DATA_IN READY Remote control Decoder VDD (5.0V or 3.3V) IRQ_N VSS (0V) Command Decoder SDA SCL I2C Serial I/F 12 Display Memory (12 x 6) SG1/KS1 10 12-bit Output Latch Segment Drivers SG7/KS7 2 VDD 500KHz oscillator Timing Generator key scan and Dimming circuit RSTB SG11/GR6 Grid/Segment Drivers SG12/GR5 2 1 K1 2 Data Selector Key Data Memory (1 x 7) 6 6-bit Shift Register GR4 4 Grid Drivers GR1 Tel: 886-66296288‧Fax: 886-29174598‧ http://www.princeton.com.tw‧2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan PT6992 FUNCTION DIAGRAM IR_DATA_IN PT6992 Key Scan Key scan IR Decoder 7 SG/KS 7 SG/GR 2 GR 4 IRQ_N READY Main Board SDA Front Panel Controller and Driver SCL STBY Power to main board Power to Main board Light-emitting diode Display(LED) Power to Front Panel Power to Front Panel board Power Supply Board TYPICAL APPLICATION CIRCUIT PRE 1.2 2 September 2010 PT6992 ORDER INFORMATION Valid Part Number PT6992-TX Package Type 24 pins, TSSOP, 173mil Top Code PT6992-TX PIN CONFIGURATION PRE 1.2 GR4 1 24 SG12/GR5 GR3 2 23 SG11/GR6 GR2 3 22 SG7/KS7 GR1 4 21 SG6/KS6 VSS 5 20 SG5/KS5 VDD 6 19 SG4/KS4 SDA 7 18 SG3/KS3 SCL 8 17 SG2/KS2 IR_DATA_IN 9 16 SG1/KS1 READY 10 15 K1 STBY 11 14 OSC IRQ_N 12 13 RSTB PT6992-TX 3 September 2010