6-9
6-6. Control Unit Descriptions
(BVM-14G5, BKM-10R)
• HC Board
1. Key Scan, LED Lighting
The SUB CPU (IC1) transmits the LED lighting signal and
key scanning output signal to the HA board and HB board
using the serial signals (MISO, MOSI, SCLK), and receives
the key scanning input signals.
2. Memory Card
The SUB CPU (IC1) reads/writes the data (adjustment data,
etc.) from/on the memory card connected to CN1.
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