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xc3s250e-4tqg144i

xc3s250e-4tqg144i

Manufacturer Part:xc3s250e-4tqg144i
Part Type:Programmable Logic ICs
Manufacturer:XILINX
Part ID:xc3s250e-4tqg144i
Date Code:
Quantity Available:17079
Last Updated:2024/11/26

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Description

Features

Applications

xc3s250e-4tqg144i Description

    3.1 KSO0~7 These pins are direct output from the 8051 Port1 and dedicated for key scan output. The pin inputss function is removed. Read 8051 Port1 is only read the data in the Port1 output register. These pins aress Pseudo open-drain structure.

xc3s250e-4tqg144i Features

    Output Capacitors (Optional) For applications with load transients (sudden changes in load current), regulator response will benefit from an external output capacitance. The recommended output capacitance of 100 µF will allow the module to meet its transient response specification (see product data sheet). For most applications, a high quality computer-grade aluminum electrolytic capacitor is adequate. These capaci- tors provide decoupling over the frequency range, 2 kHz to 150 kHz, and are suitable when ambient temperatures above 0 C. For operation below 0 C tantalum, ceramic or Os-Con type capacitors are recommended. When using one or more non-ceramic capacitors, the calculated equiva- lent ESR should be no lower than 4 mΩ (7 mΩ using the manufacturers maximum ESR for a single capacitor). A list of preferred low-ESR type capacitors are identified in Table 1-1.

xc3s250e-4tqg144i Applicatioins

    Software Data Protection (SDP) The SST39VF160Q/VF160 provide the JEDEC approved Software Data Protection scheme for all data alteration operations, i.e., Program and Erase. Any Program opera- tion requires the inclusion of the three byte sequence. The three byte-load sequence is used to initiate the Program operation, providing optimal protection from inadvertent Write operations, e.g., during the system power-up or power-down. Any Erase operation requires the inclusion of six byte sequence. The SST39VF160Q/VF160 device is shipped with the software data protection permanently enabled. See Table 4 for the specific software command codes. During SDP command sequence, invalid com- mands will abort the device to read mode within TRC. The contents of DQ15-DQ8 are Dont Care during any SDP command sequence.
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