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Microchip Technology - EPROM Memory Programming Specification

Numéro de référence 12C672
Description EPROM Memory Programming Specification
Fabricant Microchip Technology 
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PIC12C67X AND PIC12CE67X
EPROM Memory Programming Specification
This document includes the programming
specifications for the following devices:
• PIC12C671
• PIC12C672
• PIC12CE673
• PIC12CE674
1.0 PROGRAMMING THE
PIC12C67X AND PIC12CE67X
The PIC12C67X and PIC12CE67X can be pro-
grammed using a serial method. In serial mode the
PIC12C67X and PIC12CE67X can be programmed
while in the users system. This allows for increased
design flexibility.
1.1 Hardware Requirements
The PIC12C67X and PIC12CE67X requires two pro-
grammable power supplies, one for VDD (2.0V to 6.0V
recommended) and one for VPP (12V to 14V). Both
supplies should have a minimum resolution of 0.25V.
1.2 Programming Mode
The programming mode for the PIC12C67X and
PIC12CE67X allows programming of user program
memory, special locations used for ID, and the configu-
ration word for the PIC12C67X and PIC12CE67X.
Pin Diagram:
PDIP
VDD
GP5/OSC1/CLKIN
GP4/OSC2/AN3/
CLKOUT
GP3/MCLR/VPP
1
2
3
4
8 VSS
7 GP0/AN0
6 GP1/AN1/VREF
5 GP2/T0CKI/
AN2/INT
PIN DESCRIPTIONS (DURING PROGRAMMING): PIC12C671/672 and PIC12CE673/674
Pin Name
Pin Name
GP1
CLOCK
GP0
DATA
GP3/MCLR/VPP
VPP
VDD
VDD
VSS
VSS
Legend: I = Input, O = Output, P = Power
During Programming
Pin Type
Pin Description
I Clock input
I/O Data input/output
P Programming Power
P Power Supply
P Ground
© 1998 Microchip Technology Inc.
DS40175A-page 1

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