Can I use just low 4 bits for an 8-bit 8080 MCU? #2069
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I'm using ESP32 but short of pins, can I just use 4 or 6 data pins of 8 total (i.e. TFT_D0~TFT_D5)? Besides, is there any control pin that does not need to connect to ESP32 (RST, DC, WR, RD)? |
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Replies: 2 comments 2 replies
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No, 8 bit data plus WR and DC is minimum. Then CS tied low, RD tied high, RST eithet tied high or to power on reset signal. |
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Then, am I just undef CS and RD? |
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Yes, do not define them and then pins will not be allocated. |
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Thanks |
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No, 8 bit data plus WR and DC is minimum. Then CS tied low, RD tied high, RST eithet tied high or to power on reset signal.