The ATF16V8B is a high-performance CMOS (electrically- erasable) programmable logic device (PLD) that utilizes. Atmel’s proven electrically- erasable Flash. Description. The ATF16V8B is a high-performance CMOS (electricallyerasable) programmable logic device (PLD) that utilizes Atmel’s proven. The ATF16V8B is a high performance CMOS (Electrically Erasable) .. values referenced to maximum specification in AC Characteristics in the data sheet.
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Speeds down to 7. Eight outputs are each allocated eight product terms. Three different modes of operation, configured automatically with software, allow highly complex logic functions to be realized.
Several low power options allow selection of the best solution for various types of power-limited applications. Each of these options significantly reduces total system power and enhances system reliability.
This is a stress rating only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Minimum voltage is Not more than one output at a time should be shorted.
Duration of short circuit test should not exceed 30 sec.
ATF16V8B – Simple and Complex Programmable Logic – Simple and Complex Programmable Logic
See Supply Current versus Input Frequency curves. Timing measurement reference is 1. Input AC driving levels are 0. See ordering information for valid part numbers and speed grades. Typical values for nominal supply voltage. As a result, the registered output state will always be high on power-up. This feature is critical for state machine initialization.
However, due to the asynchronous nature of reset and the uncertainty of how VCC actually rises in the system, the following conditions are required: This feature will simplify testing since any state can be forced into dafasheet registers to control test sequencing. Once downloaded, the JEDEC file preload sequence will be done automatically by most of the approved programmers after the programming. Once programmed, fuse verify and preload are inhibited. However, the bit User Signature remains accessible.
The security fuse should be programmed last, as its effect is immediate. These bits can datashedt used for user-specific data. This ensures that all logic array inputs are at known states. Most PLD compilers can choose the right mode automatically. The user can also force the selection by supplying the compiler with a mode selection.
The determining factors would be the usage of register versus combinatorial outputs and dedicated outputs versus outputs with output enable control. These architectural subsets can be found in each of the configuration modes described in the following pages.
Check with your programmer manufacturer for this capability. Unused product terms are automatically disabled by the compiler to decrease power consumption. Eight bytes 64 fuses of User Signature are accessible to the user for purposes such as storing project name, part number, revision, or date.
PLD programming ATF16V8B datasheet & applicatoin notes – Datasheet Archive
The User Signature is accessible regardless of the state of the Security Fuse. Only applicable for version 3.
Most compilers have the ability to automatically select the device type, generally based on the register usage and output enable OE usage. Register usage on the device datashete the software to choose the registered mode. All combinatorial outputs with OE controlled by the dtasheet term will force the software to choose the complex mode. The software will choose the simple mode only when all outputs are dedicated combinatorial without OE control.
The different device types can be used to override the automatic device selection by the software.
(PDF) ATF16V8B Datasheet download
For further details, refer to the compiler software manuals. When using compiler software to configure the device, the user must pay special attention to the following restrictions in each mode. In registered mode pin 1 and pin 11 are permanently configured as clock and output enable, respectively. These pins cannot be configured as dedicated inputs in the registered mode.
In complex mode pin 1 and pin 11 become dedicated inputs and use the feedback paths of pin 19 and pin 12 respectively. Because of this feedback path usage, pin 19 and pin 12 do not have the feedback option in this mode. In simple mode all feedback paths of the output pins are routed via the adjacent pins.
In doing so, the two inner most pins pins 15 and 16 will not have the feedback option as these pins are always configured as dedicated combinatorial output. Eight product terms are allocated to the sum term. When the macrocell aatf16v8b configured as an input, the output enable is permanently disabled. Any register usage will make the compiler select this mode. The following registered devices can be emulated using this mode: Pin 1 controls common CLK for the registered outputs.
Pin 11 controls common OE for the registered outputs. The development software configures all the architecture control bits and checks for proper pin usage automatically. Pins 1 and 11 are regular inputs to the array. Pins 12 and 19 outermost macrocells are outputs only. They do not have input capability.
In this mode, each macrocell has seven product terms going to the sum term and one product term enabling the output. Combinatorial applications with an OE requirement will make the compiler select this mode. The following devices can be emulated using this mode: Pins 15 and 16 center macrocells are permanently configured as combinatorial outputs. Other macrocells can be either inputs or combinatorial outputs with pin feedback to the AND-array. Pins 1 and 11 are regular inputs.
The compiler selects this mode when all outputs are combinatorial without OE control. The following simple PALs can be emulated using this mode: All normalized values referenced to maximum specification in AC Characteristics in the data sheet.