What are the functions of RIM, SIM, IN?
- 10 Answers
- 71607 Views
- Pappu Sons, Wipro, I also Faced
- E-Mail Answers
Answer Posted / tarun aggarwal ymca
Read Interrupt Mask (RIM)
RIM is a multipurpose instruction used to read
the status of interrupts 7.5, 6.5, 5.5 and to
read serial input data bit. RIM loads 8-bit data in the
accumulator with the following
interpretation:
Actually RIM does the following three tasks:
1 Read the interrupt mask (bit 2, 1, 0).
2 Identify pending interrupts (bit 6, 5, 4).
3 Receive serial input data bit (bit 7).
Set Interrupt Mask
SIM is a multipurpose interrupt used to implement
the 8085 interrupts (RST 7.5, 6.5, 5.5)
and serial data output. SIM interprets the accumulator
content as follows:
Actually, SIM does the following three tasks:
1 Mask the interrupts (bit 2, 1, 0).
2 Reset RST 7.5 (bit 4). This is mainly used to overwrite
RST 7.5 without serving it.
3 To implement serial I/O (bit 7, 6). If bit 6 = 1 is used
to enable serial I/O and bit 7 is
used to transmit serial output data bit.
Input Data to Accumulator from a Port with 8-bit Address
The contents of the input port designated in the
operand are read and loaded into the
accumulator. The operand is an 8-bit address. During
execution, this port address is
duplicated in the lower order and higher order address
buses. Any one of the sets of
address lines can be decoded to enable the input port.
| Is This Answer Correct ? | 46 Yes | 16 No |
Post New Answer View All Answers
In which T-state does the CPU sends the address o memory or I/O and the ALE signal for Demultiplexing
What is the bus in a microcontroller?
What type of interrupt is the “trap” and what does it do?
Where 8086 mostly used & tell application of 8086?
what differences can you state between the hlt and hold states?
What is 8251?
what is the difference between timer and counter of microcontroller?
What is an interrupt? List various types of interrupts available in 8051 microcontroller?
Design a divide-by-3 sequential circuit with 50% duty circle now?
What is the function of ale and how does it works?
How many bits microprocessor was first developed?
When is the LOCK prefix used often?
Introduction of 8051 microcontroller architecture?
The answer to the above question is breaking the combinational circuit and pipelining it. What will be affected if you do this?
What is the difference between maskable interrupts and non-maskable interrupts?
