Samsung MSYS 5150 Service Manual

Also see for MSYS 5200: User guide

SIGNAL PIN No. Type DescriptionGPIO[11]: 188 O KS32C6100 power ready. nCPUPWR is a status nCPUPWR signaln C P U P W R that is output to the laser printer engine. Actually, any I/O port pincan be mapped to output this signal without any modifications.GPIO[10]: 187 O Parallel data output enable. When PPDOE is PPDOE “1”, thePPDOE parallel port data bus, PPD[7:0], is in output mode. Otherwise it isin input mode.GPIO[9]: 186 O Interrupt acknowledge for external ExtiACK1 interrupt requestExtlACK1 ExitREQ1.GPIO[8]: 185 O Interrupt acknowledge for external interrupt ExtiACK0 requestExtlACK0 ExitREQ0.GPIO[7]: 182 I External interrupt request input 1. For a valid ExtiREQ1 request,ExtlREQ1 this signal must be held active for at least four machine cycles.GPIO[6]: 181 I External interrupt request input 0. For a valid request, thisExtlREQ0 signal must be held active for at least four machine cycles.GPIO[5]: 180 O D M A acknowledge for external DMA2 request . The activeExtDACK2 output signal is generated whenever a DMA transfer on GDMA1 iscompleted.GPIO[4]: 179 O D M A acknowledge for external DMA1 request . The activeExtDACK1 output signal is generated whenever a DMA transfer on GDMA0 iscompleted.GPIO[3]: 178 O D M A acknowledge for external DMA0 request . The activeExtDACK0 output signal is generated whenever a DMA transfer on GDMA iscompleted.GPIO[2]: 177 I External DMA2(GDMA1) request. ExtDREQ2 is asserted by aExtDREQ2 peripheral device to request a data transfer using GDMA1. Thissignal must be held active for at least four machine cycles.GPIO[2]: 176 I External DMA1(GDMA0) request. ExtDREQ1 is asserted by aExtDREQ1 peripheral device to request a data transfer using GDMA0. Thissignal must be held active for at least four machine cycles.GPIO[2]: 175 I External DMA0(GDMA) request. ExtDREQ0 is asserted by aExtDREQ0 peripheral device to request a data transfer using GDMA. Thissignal must be held active for at least four machine cycles.NOTE: The I/O port pin assignments described in this table are presented as only one example.You can modify the port map as necessary in order to meet the requirements of a specific application.Table 1-1 KS32C6100 Signal Descriptions (Cont.)5-14 Samsung ElectronicsCircuit Description