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. | ||
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: | ==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
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