From fc42ef50e199242a40b5cda583f68ed20b844d25 Mon Sep 17 00:00:00 2001 From: Tom Nisbet Date: Tue, 6 Dec 2022 19:43:34 -0500 Subject: [PATCH] doc links --- docs/pcb.md | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/docs/pcb.md b/docs/pcb.md index 7c7162c..d464383 100644 --- a/docs/pcb.md +++ b/docs/pcb.md @@ -38,12 +38,12 @@ Power inputs and a switch are provided to support older flash and EEPROM chips t higher programming voltages. Many of these chips just need a higher voltage, like 12V, applied to the VPP pin continuously during the programing and verification cycle. In normal operation, the 5V VCC signal is also applied to the VPP pin. The board has VPP -inputs for two voltages. Applying 12V to __VPP In High__ and 5V to __VPP In Low__ lets +inputs for two voltages. Applying 12V to _VPP In High_ and 5V to _VPP In Low_ lets the VPP output be switched between these two voltages using a manual slide switch for programming. 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 +[Intel 8755 version of the hardware](../hardware/#intel-8755a-hardware-version) for an example of voltage switching by TommyPROM.