BSR Mode (BSR Command) is only applicable for Port C. In this Mode the individual bits of Port C can be set or reset. This is very useful as it. The BSR mode is a port C bit set/reset mode. The individual bit of port C can be set or reset by writing control word in the control register. The control word format . Control Word and BSR Mode Format. Page 2. The figure shows the control word format in the input/output mode. This mode is Filectrlformat
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The functionality of the is now mostly embedded in larger VLSI processing chips as a sub-function. Sign up or log in Sign up using Google. modw
The mode used eight bits of Port C only. But what is the need to set port C as output?
D3, D2 and D1 of control word register. The individual bit of port C can be set or reset by writing control word in the control register. It is an un of managing computer memory. If from the previous operation, port A is initialized as an output port and if is not reset before using the current configuration, then there is a possibility of bse of either the input device connected or or both, since both and the device connected will be sending out data.
Post as a guest Name. Moee are two different control word formats which specify two basic modes: Port A can be used for bidirectional handshake data transfer. Retrieved 3 June Interrupt logic is supported.
When we wish to use port A or port B for handshake strobed input or output operation, we initialise that port in mode 1 port A and port B can be initilalised to operate in different modes, i. The bi-directional data is transferred through port A so it consists of input and output latch.
Using BSR Mode of with – Electrical Engineering Stack Exchange
jode The inputs are not latched because the CPU only has to read their current values, then store the data in a CPU register or memory if it needs to be referenced at a later time. There are three basic aspect of storage management: Each line of port C PC 7 – PC 0 can be set or reset by writing a suitable value to the control word register.
The two modes are selected on the basis of the value present at the D 7 bit of the control word register. Input and Output data are latched.