Panasonic UF-6300, Service Manual

Page: 205 / 274

205
Signal Routing
1. LAN Transmission
a. Transfers the MMR coded data from Image Memory (FROM) to CPU (SC PCB) and converts the
MH coded data.
b. Transfer the MH coded data of CPU (SC PCB) to SDRAM.
c. Transfer the converted text data to buffer RAM on LAN controller ( LAN PCB ) sequentially.
d. The transmission packet is processed by FIFO transfer to buffer RAM and then converted for
Manchester code. Finally, they are converted for differential pair signal and transmitted to Internet.
2. LAN Reception
a. Processed received data for Manchester coded signal at LAN controller.
b. The decoded received packet goes to buffer RAM through the FIFO. The data stored in buffer RAM
is transferred to SDRAM (SC PCB) by requests from SC PCB.
c. Decodes the Base 64 for MH coded image data at SDRAM and transfers CPU (SC PCB).
d. Inputs MMR coded data from CPU transfers Image Memory (FROM).