The 8051 has () 16-bit timer/counters.
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The RI flag is set by serial port hardware at the completion of transmitting a byte. ( )
The P0 port of 8051 can be used for general I/O or as the low byte of the address bus for access external memory with MOVX instruction. ( )
The output of DAC0832 is in voltage. ( )
The number of 8051 interrupt priorities in 8051 is ______ .