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KX-FP215
6.10. LCD Section
The Gate Array (IC301) works only for writing the ASCII code from the data bus (D4~D7). V0 is supplied for the crystal drive.
R310, R311, R312 and R314 are density control resistors.
Consequently, in this unit, the timing (positive clock) is generated by the LCD interface circuitry in the gate array (IC301).
DIsplay mode Density Normal Dark
2 lines (X1. 0) LED1 (IC301-22pin) H L
XLED15 (IC301-21pin) L L
XLED14 (IC301-20pin) Hi-Z L
X1. 5 LED1 H H
XLED15 Hi-Z L
XLED14 Hi-Z Hi-Z
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