OfficeServ 500 Wireless LAN Service Manual/Ed.00 CHAPTER 3. Installation© SAMSUNG Electronics Co., Ltd. Page 1-9Main ProcessorThe main CPU used in the 8WLI is Motorola’s MC68000/MC68008 core series,which enhanced the communication function.The major specification of CPU is as follows :y Supports the interrupt mode(Normal/Dedicated mode)y Supports On-Chip 1152 byte Dual Port RAMy Supports 3 timersy Supports the selection of 4 programmable chipsy Supports 3 SCCs(Serial Communication Controllers)y Supports various protocolsy Supports various physical interfacesThe CPU is the central control part that leads the performance of programs in theboard, and basically controls the memory and main components for performing theprogram. The clock used for the program performance is the oscillator with16.384MHz frequency, and transmits/receives 16bits data operating with the memory.The interrupts are handled using the dedicated modes, and their uses are described inthe table below.Table 1.1 Interrupt Information on 8WLI CPULevel() Name RemarksNMI(7) ABORT For debuggerINT(6) DASL INT 16×DASLINT(4) DMC RX0 PB11(4×DASL)INT(4) DMC RX1 PB10(4×DASL)INT(4) 10m sec TIMMER1INT(4) SIO SCC3INT(4) INT TX0 PB9(4×DASL)INT(4) INT TX1 PB8(4×DASL)INT(1)Since several interrupts data aremultiplexed onto level4, the processing ofDMC RX and TX interrupts may getaffected.To prevent this, 10ms interrupt is loweredto level3 by S/W while performed routinely.So, even during the 10m sec interruptperformance, the DMC UART interrupt canbe processed.Flash MemoryThe OfficeServ 500 System uses the flash memory of 512Kword capacity.The AM29F800B of AMD is used, and this operates with the CPU on the 16 bitsmode for transmitting/receiving data.In the flash memory, the programs for the 8WLI to perform the relevant functions,including a booting program, are saved. When the program is changed, the programcan be upgraded using SIO(Serial Input Output) through the UART.
