home *** CD-ROM | disk | FTP | other *** search
- ≡
- .RSTF
- Overview
- This is the reserved word in a functional equation that defines when
- to assert a reset signal high on devices having flip-flops or
- registers with a reset input.
-
-
- Syntax──────────────────────────────────────────────────────────────
-
- Pn.RSTF Assignment operator Expression
- ────────────────────────────────────────────────────────────────────
-
- Device Support:
- PAL10H20EG8 PAL10H20EV8 PAL16RA8 PAL20RA10 PAL22IP6
- PAL22RX8 PAL22V10 PAL23S8 PAL26V12 PALCE29M16
- PALCE29MA16 PAL32VX10 PALCE610 PLS105 PLS167
- PLS168 PLS30S16 MACH 1 MACH 2
- ·
- Syntax
- You use this reserved word in a functional equation in the equations
- segment of Boolean and state designs.
-
-
- Syntax──────────────────────────────────────────────────────────────
-
- Pn.RSTF Assignment operator Expression
- Example─────────────────────────────────────────────────────────────
-
- EQUATIONS
- Q0 = /Q1 */Q2
- Q0.RSTF = RST * /SET
- ...
- ────────────────────────────────────────────────────────────────────
- ·
- Definitions
-
- Pn.RSTF Identifies the pin or node associated with the
- flip-flop having a reset input.
-
- Assignment Operator Include a symbol that defines a specific
- operation as interpreted by the software when
- processing design files.
-
- Expression Defines the logic conditions that determine when to
- assert the reset signal high. In the syntax example,
- when RST is true and SET is false the reset pulse is
- initiated.
- ·
- Use
- Multiple .RSTF statements for the same pin or node are automatically
- ORed together into one statement. This can result in an error during
- either assembly or fitting. You can specify a global reset on devices
- with global nodes, for example, global node.RSTF.
-
- You cannot use negative polarity on the left side of an equation. For
- example, /Q1.RSTF is not allowed.
-
- You can use the GROUP, STRING, and VECTOR notation to define signals.
- This is an excellent way to assign a functional equation to several
- pins and nodes.
-
- Depending on the device, the reset line is synchronous or
- asynchronous. On the PAL16RA8, if both preset and reset of a
- flip-flop are high, the flip-flop is bypassed.
-
- In the simulation history file, .RSTF is represented by the letter L,
- SETF by the letter H and .PRLD by the letter P.
- ·
- Related Topics
- Boolean Equation
- EXPRESSION
- Functional Equation
- PRELOAD
- SETF
- ·
-