PIC17C43 datasheet(5/16 Pages) MICROCHIP

Part #	PIC17C43

Description	EPROM Memory Programming Specification

PDF	16 Pages

Scroll/Zoom	100%

Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

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5 / 16 page

DS30139I-page 5

EPROM Memory Programming Specification

FIGURE 3-2:

RECOMMENDED PROGRAMMING ALGORITHM FOR USER EPROM

Start

Pass

Blank

check?

Yes

Pass?

Pulse-

count

>25

Apply (3 x Pulse-count)

more 100 µs programming

pulses for margin

(Over programming)

Load new address

Pulse-count = 0

Pass?

Yes

Verify blank

Issue "Blank check fail"

error message

Load new data

Set VDD = VDDP

Verify location for

correct data

Program using 100µs

pulse increment

pulse-count

Location fails

programming, issue error

message "Unable to

program location"

Set VDD = VDD min

Verify location

Programming error:

Issue error message

"Fail verify @ VDD min/max"

Set VDD = VDD min

Set VDD = VDD max.

Verify location(s)

Set VDD = VDDmax

Set VDD = VDDmin

“Fail verify @ VDDmin/max”

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