Samsung SF11OT Servise Manual

Circuit Description5-2-4 Real Time Clock (RTC) minutes, seconds, year, month, and day.cI(rA battery maintains operation when power is off.This circuit receives clock pulses from an external XFC-B can up-track 32 years, beginning with 1992.32.768 kHz crystal, which it divides into hours,32768 KHz 15 BIT 1Hz- PRESCALERH 6 BIT 1 co=6~~~ co=6k[zSECONDSCO=24BUSY FLAG CLEAR BUSY FLAG-CO=28,29,: 5BIT730,0r 31 4 BIT co=12 5 BITMONTHS YEARSI ILEAP YEARDECODER1 D R I V E R 1Figure 5-3: RTC Block Diagram5-2-5 Print ControlThe PCLK and PDAT signals synchronise serialprint data to the TPH. PLAT latches TPH serialprint data to the TPH from a shift register throughPDAT. STBl - STB4 enable TPH printing in foursequential intervals.This system has a lOms/Line printing format anddetermines STB High/Low enable statusaccording to the STBPOL signal.Print PrintCmd CmdA APrintLine(MSINT Cary-out)Shifi Datan nSh D Sh C I I Sh D Sh CShift ClkSTBlSTB2IIIIlIIIIIIIIllI wiiiiiiiiir llllllllulllllllIFigure 5-4: Printer TimingSamsung Electronics 5-3