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4-2
UP-D70/D70A (UC,CE)
1. System Control Section
a) Program transmission to each circuit board
When SY-270 board is rising, nRESET and nSTNBY are set to L and sent them to each circuit
board CPU in order to stand by hardware. The program is sent to SRAM of each circuit board.
Following figure is chart for sending from SY-270 board to IF-610 board (SEL=4).