S1K50000 Epson Electronics America, Inc., S1K50000 Datasheet - Page 35
S1K50000
Manufacturer Part Number
S1K50000
Description
Design Guide S1k50000 Series
Manufacturer
Epson Electronics America, Inc.
Datasheet
1.S1K50000.pdf
(131 pages)
- Current page: 35 of 131
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Chapter 2: Precautions on Circuit Design
2.11 Limitations and Restrictions on VHDL and Verilog-HDL
2.11.1 Common
30
The VHDL and Verilog-HDL netlists to be interfaced to Seiko Epson must be in the form of
pure gate-level netlists (not including an operational description). The following specifies the
limitations and restrictions to which the development of Seiko Epson ASICs by VHDL or
Verilog-HDL is subject.
(1) External pin names (I/O pins)
(2) Internal pin names (including a bus’ net names)
(3) Bus description at the top of modules is prohibited.
(4) Input/output cells must use the same library series. No cells can be used in a
(5) Operational descriptions using behavior or C language are not permitted. Such
(6) All time scales in each library series are expressed to an accuracy of 1 ps.
• To be written entirely in uppercase letters.
• Number of charactersLimited to between 2 and 32 characters.
• Usable characters
• Examples of unusable characters and strings:
• Although a combination of uppercase and lowercase letters is permitted, the use speci-
• Number of characters: Limited to between 2 and 32 characters
• Usable characters:
Example: DATA[3:0], DATA[3], DATA[2], and the like are prohibited. DATA0, DATA1,
combination of different series.
descriptions in netlists have no effect.
Netlists
fied below is prohibited.
Example: Mixed use of _RESET_ and _Reset_, etc.
DATA2, and the like are all permitted.
Only alphanumeric characters and underscore '_' can be used.
The string must always begin with a letter, however.
2INPUT: The string begins with a number.
\2INPUT: The string is prefixed by a backslash '\'.
InputA:
_INPUTA: The string begins with an underscore '_'.
INA[3:0]: A bus is used for an external pin name.
INA[3]:
Only alphanumeric characters, underscore '_', _[]_ (Verilog bus
bracket), and _()_ (VHDL bus bracket) can be used. The string
must always begin with a letter, however.
The string includes lowercase letters.
A bus is used for an external pin name.
EPSON
STANDARD CELL S1K50000 SERIES
DESIGN GUIDE
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