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Altera_Forum
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15 years ago

Error: The pin "data[5]" has multiple drivers due to the constant driver

Hello, Im kinda new with Quartus II and VHDL so let's go. Im projecting a simple CPU. with 4 registers. so i have 2 signals to let the register (normal_buffer) read from the bus or right. th...
Altera_Forum's avatar
Altera_Forum
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15 years ago

PC and tri_buffer are both driving the signal data, which causes an error, if any tri_buffer instance is enabled. PC must use inout type and also tristate the signal to avoid this problem.

P.S.: In the present code, PC can be enabled at the same time as a tri_buffer. You have to change this, too.