KX-P7100
4.4.17. Internal Engine I / F (Control CPU - Engine CPU)
The communication I/F signal between Control CPU and Engine CPU in main board is as follows.
PPRDY: | Printer Engine had been Powered On. |
nPRDY: | Engine status is ready for communication. |
nTOP: | A vertical synchronous signal which indicates the home position in a recording sheet. |
nHSYNC: | A horizontal synchronous signal which indicates the home position of horizontal laser scanning. |
nPRINT: | After receiving this signal from RIP CPU, the engine starts printing. By other words, print request. |
nVIDEO: | Video image data which modulate laser beam. |
nPURGE: | Paper purge signal which asserted when the paper exit to the tray. |
nPSAVE: | Engine power save command signal. |
CXD: | Serial command data from RIP to ECU. |
SXD: | Serial Status data from ECU to RIP. |
nCBSY: | Data transfer busy signal from RIP to ECU. |
nSBSY: | Data transfer busy signal from ECU to RIP. |
CCLK: | Communication clock for those serial data. ( RIP assert ) |
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