2-27MultiPASS C530/C560 Chapter 2: Technical Referencea-4) Main ROM (IC3)This 8 Mbit ROM contains the control programs (e.g. operation panel, scanner and communicationssection etc.) for this fax.a-5) SRAM (IC 21)This 256 Kbit SRAM is backed up by lithium battery. SRAM holds data registered for system controland communications management information. Also, SRAM stores contact sensor LED light-on timedata.a-6) DRAM (IC 11)This 64Mbit (MultiPASS C560)/16Mbit (MultiPASS C530) DRAM is used as memory for storingimage data, and as an MPU work area.b) Communication control section (on Modem board)b-1) Modem ICMultiPASS C560 (IC 7)A Conexant R288F (PLCC type) is used as the modem IC. The MODEM IC carries out G3 modulationconforming to ITU-T standards V.34, V.29, V.27ter, V.21, V.17 and V.8 on transmitted data receivedfrom the MPU during transmission. During reception, the MODEM IC carries out G3 modulation onreceived signals from the telephone line, according to the same standards.MultiPASS C530 (IC 2)A Conexant FM214 (QFP type) is used as the modem IC. The MODEM IC carries out G3 modulationconforming to ITU-T standards V.29, V.27ter, V.21 and V.17 on transmitted data received from theMPU during transmission. During reception, the MODEM IC carries out G3 modulation on receivedsignals from the telephone line, according to the same standards.c) Document scanning sectionc-1) System controller IC (IC 4)The system controller IC include image processing function (UHQ) are as follows:• A/D conversionInput signals from the contact sensor are A/D converted.• Generation of shading data (RGB color & Black and white)• ABC (Auto Background Control)Sets the slice level for each scan line.• Edge enhancement processing• Binaryzation processing• Halftone processing• Contact sensor LED control• Document feed motor controlAlso, the system controller IC include color image processing function are as follows:• Color image processingThe RGB data is converted into CMYK print data.
