Code for an 8-bit shift-left register with a. Any Veriloga code of a 10-bit parallel in serial out (PISO) shift register. Verilog code for an 8-bit shift-left register with a negative-edge clock. 20 Nov 2016 - 22 min - Uploaded by Learn ItParallel input serial output register in vhdl. I am learning and practicing Verilog HDL. I wanted to design a 16 bit parallel in series out shift register. Module verilogshiftregistertestPISO( din, clk, load, dout ); output reg dout; i. Verilog code Saturday, 4 July 2015. Output dout; input din. // File: Serial IN Parallel OUT Shift Register using Behavior Modeling Style.v. This sequential device loads the data present on its inputs and then moves or “shifts” it to its output once every clock cycle, hence the name Shift Register. A shift register basically consists of several single bit “D-Type Data Latches”, one for each data bit, either a logic “0” or a “1”, connected together in a serial type daisy-chain arrangement so that the output from one.
- Shift Register In Verilog
- Parallel Input Serial Output Shift Register Verilog Codes
- Shift Left Register Verilog
8-bit parallel-in/serial-out shift register
The 74LV165 is an 8-bit parallel-load or serial-in shift register with complementary serial outputs (Q7 and Q7) available from the last stage. When the parallel-load input (PL) is LOW, parallel data from the inputs D0 to D7 are loaded into the register asynchronously. When input PL is HIGH, data enters the register serially at the input DS. It shifts one place to the right (Q0→Q1→Q2, etc.) with each positive-going clock transition. This feature allows parallel-to-serial converter expansion by tying the output Q7 to the input DS of the succeeding stage.
The clock input is a gate-OR structure which allows one input to be used as an active LOW clock enable input (CE) input. The pin assignment for the inputs CP and CE is arbitrary and can be reversed for layout convenience. The LOW-to-HIGH transition of the input CE should only take place while CP HIGH for predictable operation. Either the CP or the CE should be HIGH before the LOW-to-HIGH transition of PL to prevent shifting the data when PL is activated.
Shift Register In Verilog
Features and benefits
- Wide supply voltage range from 1.0 V to 5.5 V
- Synchronous parallel-to-serial applications
- Optimized for low voltage applications: 1.0 V to 3.6 V
- Synchronous serial input for easy expansion
- Latch-up performance exceeds 250 mA
- 5.5 V tolerant inputs/outputs
- Direct interface with TTL levels (2.7 V to 3.6 V)
- Power-down mode
- Complies with JEDEC standards:
- JESD8-5 (2.3 V to 2.7 V)
- JESD8B/JESD36 (2.7 V to 3.6 V)
- JESD8-1A (4.5 V to 5.5 V)
- ESD protection:
- HBM JESD22-A114-A exceeds 2000 V
- MM JESD22-A115-A exceeds 200 V
- Specified from -40°C to +85°C and from -40°C to +125°C
Parametrics
| Type number | VCC (V) | Logic switching levels | Output drive capability (mA) | tpd (ns) | fmax (MHz) | No of bits | Tamb (°C) | Rth(j-c) (K/W) | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 74LV165D | Production | 1.0 - 5.5 | TTL | ± 12 | 18 | 78 | 8 | low | -40~125 | 91 | 9.3 | 51 | SO16 |
| 74LV165DB NRND | Not for design in | SSOP16 | |||||||||||
| 74LV165PW | Production | 1.0 - 5.5 | TTL | ± 12 | 18 | 78 | 8 | low | -40~125 | 120 | 3.3 | 48.7 | TSSOP16 |
Package
| Package | Package information | Reflow-/Wave soldering | Status | ||||
|---|---|---|---|---|---|---|---|
| 74LV165D | SO16 (SOT109-1) | SOT109-1 | SO-SOJ-REFLOW SO-SOJ-WAVE | Reel 13' Q1/T1 | Active | 74LV165D | 74LV165D,118 (9351 560 60118) |
| Bulk Pack | Active | 74LV165D | 74LV165D,112 (9351 560 60112) | ||||
| 74LV165DB NRND | SSOP16 (SOT338-1) | SOT338-1 | SSOP-TSSOP-VSO-REFLOW SSOP-TSSOP-VSO-WAVE | Reel 13' Q1/T1 | Active | LV165 | 74LV165DB,118 (9351 660 30118) |
| Bulk Pack | Active | LV165 | 74LV165DB,112 (9351 660 30112) | ||||
| 74LV165PW | TSSOP16 (SOT403-1) | SOT403-1 | SSOP-TSSOP-VSO-WAVE | Reel 13' Q1/T1 | Active | LV165 | 74LV165PW,118 (9351 745 40118) |
| Bulk Pack | Active | LV165 | 74LV165PW,112 (9351 745 40112) |
Quality, reliability & chemical content
| Leadfree conversion date | ||||||||
|---|---|---|---|---|---|---|---|---|
| 74LV165D | 74LV165D,118 | 74LV165D | week 6, 2004 | 144.9 | 10.23 | 9.78E7 | 1 | 1 |
| 74LV165D | 74LV165D,112 | 74LV165D | week 6, 2004 | 144.9 | 10.23 | 9.78E7 | 1 | 1 |
| 74LV165DB NRND | 74LV165DB,118 | 74LV165DB | week 12, 2005 | 1 | 1 | |||
| 74LV165DB NRND | 74LV165DB,112 | 74LV165DB | week 12, 2005 | 1 | 1 | |||
| 74LV165PW | 74LV165PW,118 | 74LV165PW | week 17, 2005 | 144.9 | 10.23 | 9.78E7 | 1 | 1 |
| 74LV165PW | 74LV165PW,112 | 74LV165PW | week 17, 2005 | 144.9 | 10.23 | 9.78E7 | 1 | 1 |
Documentation (10)
| File name | Title | Type | Date |
|---|---|---|---|
| 74LV165 | 8-bit parallel-in/serial-out shift register | Data sheet | 2017-03-17 |
| Nexperia_Selection_guide_2020 | Nexperia Selection Guide 2020 | Selection guide | 2020-01-31 |
| SO-SOJ-REFLOW | Footprint for reflow soldering | Reflow soldering | 2009-10-08 |
| SO-SOJ-WAVE | Footprint for wave soldering | Wave soldering | 2009-10-08 |
| SOT109-1 | plastic, small outline package; 16 leads; 1.27 mm pitch; 9.9 mm x 3.9 mm x 1.35 mm body | Package information | 2020-04-21 |
| SSOP-TSSOP-VSO-WAVE | Footprint for wave soldering | Wave soldering | 2009-10-08 |
| SOT403-1 | plastic, thin shrink small outline package; 16 leads; 5 mm x 4.4 mm x 1.1 mm body | Package information | 2020-04-21 |
| SSOP-TSSOP-VSO-REFLOW | Footprint for reflow soldering | Reflow soldering | 2009-10-08 |
| SSOP-TSSOP-VSO-WAVE | Footprint for wave soldering | Wave soldering | 2009-10-08 |
| SOT338-1 | plastic, shrink small outline package; 16 leads; 0.65 mm pitch; 6.2 mm x 5.3 mm x 2 mm body | Package information | 2020-04-21 |
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Jul 28, 2013. 4 Bit Comparator Design Verilog CODE. Serial OUT Shift Register using Behavior Modeling Style. Parallel IN - Serial OUT Shift Register.v. Serial OUT Shift Register using Behavior Modeling Style. 4 Bit Comparator Design Verilog CODE. Parallel IN - Serial OUT Shift Register.v.
In, a shift register is a cascade of, sharing the same, in which the output of each flip-flop is connected to the 'data' input of the next flip-flop in the chain, resulting in a circuit that shifts by one position the ' stored in it, 'shifting in' the data present at its input and 'shifting out' the last bit in the array, at each transition of the clock input. More generally, a shift register may be multidimensional, such that its 'data in' and stage outputs are themselves bit arrays: this is implemented simply by running several shift registers of the same bit-length in parallel.
Shift registers can have both and inputs and outputs. These are often configured as 'serial-in, parallel-out' (SIPO) or as 'parallel-in, serial-out' (PISO). Dashlane Cracked.
There are also types that have both serial and parallel input and types with serial and parallel output. There are also 'bidirectional' shift registers which allow shifting in both directions: L→R or R→L.
The serial input and last output of a shift register can also be connected to create a 'circular shift register'. Contents • • • • • • • • Serial-in serial-out (SISO) [ ] Destructive readout [ ] 0 0 0 0 1 0 0 0 1 1 0 0 0 1 1 0 1 0 1 1 0 1 0 1 0 0 1 0 0 0 0 1 0 0 0 0 These are the simplest kind of shift registers.
The data string is presented at 'Data In', and is shifted right one stage each time 'Data Advance' is brought. At each advance, the bit on the far left (i.e. 'Data In') is shifted into the first 's output. The bit on the far right (i.e. Data Out) is shifted out and lost.
The data are stored after each on the 'Q' output, so there are four storage 'slots' available in this arrangement, hence it is a 4-bit Register. To give an idea of the shifting pattern, imagine that the register holds 0000 (so all storage slots are empty). As 'Data In' presents 1,0,1,1,0,0,0,0 (in that order, with a pulse at 'Data Advance' each time—this is called clocking or strobing) to the register, this is the result. The right hand column corresponds to the right-most flip-flop's output pin, and so on. So the serial output of the entire register is 00001011. It can be seen that if data were to be continued to input, it would get exactly what was put in (10110000), but offset by four 'Data Advance' cycles. This arrangement is the hardware equivalent of a.
Also, at any time, the whole register can be set to zero by bringing the reset (R) pins high. This arrangement performs destructive readout - each datum is lost once it has been shifted out of the right-most bit. Serial-in parallel-out (SIPO) [ ]. This configuration allows conversion from serial to parallel format. Data input is serial, as described in the SISO section above. Once the data has been clocked in, it may be either read off at each output simultaneously, or it can be shifted out. In this configuration, each flip-flop is.
Parallel Input Serial Output Shift Register Verilog Codes
All flip-flops operate at the given clock frequency. Each input bit makes its way down to the Nth output after N clock cycles, leading to parallel output. In cases where the parallel outputs should not change during the serial loading process, it is desirable to use a latched or output.
In a latched shift register (such as the ) the serial data is first loaded into an internal buffer register, then upon receipt of a load signal the state of the buffer register is copied into a set of output registers. In general, the practical application of the serial-in/parallel-out shift register is to convert data from serial format on a single wire to parallel format on multiple wires. Parallel-in serial-out (PISO) [ ] This configuration has the data input on lines D1 through D4 in parallel format, D1 being the most significant bit. To write the data to the register, the Write/Shift control line must be held LOW.
Shift Left Register Verilog
To shift the data, the W/S control line is brought HIGH and the registers are clocked. The arrangement now acts as a PISO shift register, with D1 as the Data Input. However, as long as the number of clock cycles is not more than the length of the data-string, the Data Output, Q, will be the parallel data read off in order. Toshiba TC4015BP - Dual 4-Stage Static Shift Register (with serial input/parallel output) One of the most common uses of a shift register is to convert between serial and parallel interfaces. This is useful as many circuits work on groups of bits in parallel, but serial interfaces are simpler to construct. Keepass download.
Shift registers can be used as simple delay circuits. Several bidirectional shift registers could also be connected in parallel for a hardware implementation of a. SIPO registers are commonly attached to the output of microprocessors when more pins are required than are available. This allows several binary devices to be controlled using only two or three pins, but slower than parallel I/O - the devices in question are attached to the parallel outputs of the shift register, then the desired state of all those devices can be sent out of the microprocessor using a single serial connection. Similarly, PISO configurations are commonly used to add more binary inputs to a microprocessor than are available - each binary input (i.e. A button or more complicated circuitry) is attached to a parallel input of the shift register, then the data is sent back via serial to the microprocessor using several fewer lines than originally required.