Reset generator: Difference between revisions

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The Mitsumi PST518B is a [[reset]] generator, it holds the NeoGeo in reset as long as the power supply is below 4.4V.
The Mitsumi PST518B is a [[reset]] generator, it holds the NeoGeo in reset as long as the power supply is below 4.4V.


Datasheet: [[File:PST518B.pdf PST518B.pdf]].
It has an open-collector output tied to the {{Sig|RST|RST}} line (not {{Sig|RESET|RESET}} !), which is shared with the reset button on the home system. The line goes to {{Chipname|NEO-B1}}.


Not to be confused with the [[watchdog]] reset.
Not to be confused with the [[watchdog]] reset.


[[Category:Base system]]
==Internal schematic==
 
[[File:Pst518b.png]]
 
Datasheet: [[File:PST518B.pdf]].
 
==Replacement==
 
Not pin-compatible: TL7757CL
 
Pin-compatible: MCP120-450GI/TO
 
 
[[Category:Chips]]

Latest revision as of 22:07, 13 June 2020

File:Cd1 resetgen.jpg
PST518B in a CD1 system.

The Mitsumi PST518B is a reset generator, it holds the NeoGeo in reset as long as the power supply is below 4.4V.

It has an open-collector output tied to the RST line (not RESET !), which is shared with the reset button on the home system. The line goes to NEO-B1.

Not to be confused with the watchdog reset.

Internal schematic

Datasheet: File:PST518B.pdf.

Replacement

Not pin-compatible: TL7757CL

Pin-compatible: MCP120-450GI/TO