| 摘要 |
The self-alcohol measuring circuit consists of on-board computer which has z-80 CPU, ROM, RAM, and I/O port. ROM with program uses the address form 0000H to 7FFFH, RAM which has voice information for directional broadcasting used the address from 8000H to 9FFFH. "A" port in the I/O port is used for output of directional broadcasting information voice, and "B" port in the I/O port is used for digital information input of air pressure, alcohol density, intensity of light, data output for 7-segment display and so on. "C" port is used for the address of A-D converter, start, OE and 7-segment(9) digital output.
|
