add TommyPROM32 schematic image

This commit is contained in:
Tom Nisbet 2023-09-18 15:08:10 -04:00
parent 91cc45e700
commit d8baefaaf4
5 changed files with 2 additions and 1 deletions

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@ -61,9 +61,10 @@ planned with multiple _VPP Output_ pins and some general-purpose interconnect pi
[![TommyPROM PCB](images/TommyPROM32-27C257-erase-500.jpg)](images/TommyPROM32-27C257-erase.jpg)
For chips that require a high voltage VPP pulse during programming, some external
switching circuitry will be needed to allow the Arduino to control the VPP voltage. There
is a header connected to the unused D13 pin that can support this. See the
[Intel 8755 version of the hardware](hardware/#intel-8755a-hardware-version) for an
example of voltage switching by TommyPROM.
[![TommyPROM PCB](images/TommyPROM32-sch-700.png)](images/TommyPROM32-sch.png)

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