− 7-4 −7.1.3 Main Board to SD/SIM Board Connector (J403 on main board)The main board to SD/SIM board connector is a 25-pin inner signal exchanging connector that connects the main board withthe SD/SIM board for SD card, SIM card and other interface signals.The signal names below are based on the signal names on the schematic of the main board.74 VDD-IR Power supply for IrDA module75 GND Ground76 GND Ground77 GND Ground78 HF-SPK+ Hands free speaker output +79 HF-SPK- Hands free speaker output -80 GND GroundPin No. SignalNameMainSD/SIMFunction1 GND Ground2 GND Ground3 GND Ground4 GND Ground5 VMAIN VMAIN power supply6 VMAIN VMAIN power supply7 CC-CLK SIM card clock from S-GOLD8 CC-RST SIM card reset control from S-GOLD9 VSIM1-SW SIM card power supply controlled by S-GOLD10 CC-IO SIM card IO data from S-GOLD11 MMC-DAT0-SPI-DISD card data line 0 from OMAP12 SD-SWI SD card hot insertion/de-insertion detection lineto OMAP13 VSD Power supply for SD card14 MMC-DAT3 SD card data line 3 from OMAP15 MMC-DAT2 SD card data line 2 from OMAP16 MMC-DAT1 SD card data line 1 from OMAP17 VIB Vibrator control line from S/M power18 MMC-CMD-SPI-D0SD card command line from OMAP19 KBI-R3 Keypad input line for row 3 to OMAP20 MMC-CLK SD card clock from OMAP21 KBI-C5 Keypad output line for column 5 to OMAP22 GND Ground23 GND Ground24 GND Ground25 GND Ground