No VPP on PIC18F47J53. What the.....?

Thread Starter


Joined Oct 29, 2009
I am looking at the datasheet for the PIC18F47J53 and I do not see a VPP pin.

It does have an MCLR pin which usually is always VPP.

The datasheet does say:

PIC18F47J53 family microcontrollers can be serially
programmed while in the end application circuit. This is
simply done with two lines for clock and data, and three
other lines for power, ground and the programming

Is it safe to assume that VPP is on the same pin as MCLR?


Joined Feb 19, 2009

To Verify, look at the PIC18 range reference manual (Forgot number/name), it is like the "mid-range devices reference manual", but for the PIC18 series.

Also the ICSP info PDF refers to "Pin 1 connects to MCLR", rather than "MCLR/Vpp"

Also this from Microchip, Doesn't matter for the 3.3V devices:

PIC18 J-series devices do not use high voltage (VPP) programming. During programming, no signal ever exceeds VDD.
PICKit 2 and 3 "know" this, and use the low voltage programming method.

Release notes V2.60.00 ----------------------------------------------------------------- New Features: ------------- > Low Voltage Programming mode support Low voltage programming mode (LVP) is now supported for all PICkit 2 supported devices which feature this option. Refer to the device datasheet and programming specification for information on the LVP programming mode. LVP programming mode is enabled by the menu "Tools > User LVP Program Entry" This can only be enabled in Manual Device Select mode. When enabled, the text "LVP" in red will appear above the Device select combo-box. For devices using the PGM pin in LVP mode, PICkit 2 ICSP connector pin 6 AUX must be connected to the device PGM pin. NOTE: LVP mode may only be used with devices that *already* have the LVP configuration bit enabled. Blank devices always have the LVP bit enabled.
From: 2 Readme v2-61-00 (a).txt
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