Other - Elnec MEMprog2 User Manual

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PICmicro microcontrollers
This interface corresponds with Microchip application notes TB013, TB017, TB016: How to
Implement ICSP
These application notes describes requirement for target system with In-system programming
device and ISP programmer.
Following signals are use for In-system programming of PICmicro
• MCLR\ / VPP reset / switch to programming mode
• RB6 (GP1)
• RB7 (GP0)
• VDD power supply
• GND ground
When PICmicro
Therefore, the target system must be isolated from this voltage provided by programmer.
RB6 and RB7 signals are used by the PICmicro
system mustn't affect these signals during In-system programming to avoid programming
errors.
Marginal verify is used after programming. Programmer must verify the program memory
contents at both minimal and maximal power supply, therefore VDD pin of PICmicro
isolated from rest of target system during programming.
ELNEC recommended circuit for PICmicro:
Note: External reset circuit is necessary only if VDD power-up slope is too slow.

Other

Attention to multitasking OS (Windows 98/Me/NT/2000/XP/Vista). There is needful for regular
running of control program for any ELNEC programmer that printer port, on which is
programmer connected, must be reserved for this programmer only. Otherwise, any other
program must not simultaneously to use (or any way to modify) this printer port.
TM
Using PIC16CXXX OTP (PIC12C5XX OTP)(PIC16F8X Flash) MCUs.
clock
data input / output
®
device is programmed, pin MCLR\ / VPP is driven to approximately 12 V.
ISP connector
DATA
CLK
VDD
MCLR/VPP
VSS
R11
22k
C2
1u/25V
VSS
reset circuit
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for In-system programming, therefore target
target device
C1
22n
VSS
D1
*1
R7
47R
VDD
VSS
D2
RB7
1N4148
RB6
MCLR/VPP
R6 1k
VSS
VSS
171
Common notes
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microcontrollers.
target system
VDD
R1
R2
I1
PICxxxxx
VSS
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must be