Latch and Buffer differences

A latch is a device that samples at a certain time, and the output retains the sampled results, with the clock rising along the latch, and the falling edge locked in two kinds. is mainly composed of master-slave trigger, such as RJ,SK trigger composed of D latch.

A buffer is a relationship (equal to or opposite) to the input that is output at any time following the input. Its main purpose is to increase the load, is generally a (Rj/sk ...   Trigger The buffer register is also called the buffer, it is divided into two kinds of input buffer and output buffer.

The role of the former is to temporarily store the data sent by the peripheral, so that the processor can take it away, the latter is used to temporarily store the processor sent to peripheral data. With the numerical control buffer, the high-speed working CPU and the slow working peripheral can be coordinated and buffered to achieve the synchronization of data transmission. Since the buffer is connected to the data bus, it must have a tri-state output function.

LATCH latch: The state of the output does not change with the state of the input, only the state entered when there is a latched signal is saved to the output until the next latched signal. Typically there are only 0 and 12 values. A typical logic circuit is a D trigger.

The buffer register is also called the buffer, it is divided into two kinds of input buffer and output buffer.

Another way to classify a buffer: the buffer is one of the digital components, it does not perform any operation on the input value, its output value and input value, but it plays an important role in the design of the computer. Buffers are divided into two kinds, commonly used buffers (commonly said buffers) and three-state buffers. Conventional buffers always output values directly, and are used in the propulsion current to a higher-level circuit system. Tri-State Buffers In addition to the function of the conventional buffer, there is an option cartoon input, denoted by E.   There are different output values when e=0 and e=1. When e=1, the input is sent directly to the output, if the e=0, the buffer is blocked, regardless of the input value, the output is always high impedance state, expressed in Z. The high-impedance state reduces the current to low enough so that the output of the buffer is not connected to anything.

function of the buffer: 1. Complete the speed match.  2. Provide a space for staging. 3. Enlarge the signal to improve the driving ability. Reduce the impact of transmission and load on the signal source. 4. The role of signal isolation, to eliminate the impact of the load on the signal source.