Toshiba TC9314F Manual page 55

2. Key Timing Output Port
T0~T7 form an 8 bit output port. When forming a key matrix by software, this port outputs the key
timing signal.
Accordingly, the N channel FET output has a high resistance to minimize the sink current. Therefore,
when using these pins as standard output ports, be careful of the type of circuit being driven.
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TC9314F
2003-07-03