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PIC17C43 Datasheet(PDF) 4 Page - Microchip Technology

Part # PIC17C43
Description  EPROM Memory Programming Specification
PDF  16 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC17C43 Datasheet(HTML) 4 Page - Microchip Technology

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PIC17CXX
DS30139I-page 4
© 1996 Microchip Technology Inc.
3.0
PROGRAMMING SPECIFICATIONS
FIGURE 3-1:
PROGRAMMING ROUTINE FLOWCHART
If programming is desired,
force port B = MSB of data
force port C = LSB of data
(hold 10Tcyc after
RA0 is raised)
Present address on ports
RB, RC hold Tcy
after RA1 changes to 1
Reset
RA2 = 0
RA3 = 0
RA4 = 1
MCLR = 1
B port = 0xE1
(hold for 10 Tcy)
RA1
= 0
No
RA1
= 1
Yes
Stop driving address
on port
RA1
= 0
No
RA1
= 1
No
Yes
Yes
B port = MSB of Data
C port = LSB of Data
Read MSB of data
from port-B.
Read LSB of data
from port-C.
Enable RA0 to end
prog cycle
RA0 = 0
No
RA1
= 0
Yes
Yes
No
RA0= 1
RA1
= 1
No
No
Yes
RA0= 1
RA1
= 1
Yes
Yes
No
No
Yes
RA1
= 0
No
Yes
RA1
= 1
No
Yes
RA1
= 0
No
Yes
- B port is forced by the part
B port = xxx
- B port is tri-state, should be forced by user
Min RA1 high or low = 10 Tcy
Yes
No
B port = xxx
Increment
Address
Program 16 bit
data
B & C ports not
driven by part



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