Brother International HL-2400C Service Manual - Page 98

Power On IREADY-N PRREQ-N VSYNC-N VIDEO-P VSYNC-N HSYNC-N VIDEO-P Horizontal synchronization signal for printing Video data signal Command signal sent from the controller to the engine Status signal sent from the engine to the controller Fig.4-38 shows the timing of each signal after the power switch is turned on. 210s MAX. 0.1sec. MIN. 15sec. MAX. (K) data (C) data 1.0sec. MAX. 3.75s 3.0sec. MAX. for Continuous Printing (M) data (Y) data 15us MIN. 10ms MAX. 417.781us 1st line 2nd line 56.296ns 1dot Last line Fig.4-38 The COMMAND signal and STATUS signal are the signals that are used to transfer the data between the controller and the engine, which perform as a half-duplex asynchronous serial communication. Refer to Fig.4-39. Start bit COMMAND LSB STATUS Stop bit Parity bit P MSB 8ms (TYP) 30ms (MAX) LSB Start bit Fig.4-39 MSB P Parity bit Stop bit IV-49