第七章单元测试
- Name the three types of bus which are used when external memory is connected to the 8051.
( ) - When using external RAM, which port is used for the low address byte? （ ）
- If we need to expand an 8031 by adding 32Kbytes of code memory EPROM, how many address lines should be connected between the 8031 and the EPROM? （ ）
- If an 8031 chip is connected to an external EPROM, Which line can generate a signal to enable reading of data from the EPROM? （ ）
- If the program is stored entirely in an external EPROM, what voltage must be applied to the /EA PIN on the 8051? （ ）
A:Enable bus
B:Address bus
C:Control bus
D:Data bus
答案:Address bus
###Control bus
###Data bus
A:Port 0 B:Port 2 C:Port 3
D:Port 1
A:16
B:14 C:13 D:15
A:/WR B:/RD
C:/EA D:/PSEN
A:+10 volts
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B:0 volts C:+5 volts D:-10 volts
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